TinkerMill Wiki - User contributions [en]

4KW Laser

2025-06-28T18:28:31Z

Neil.gabriel:

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|captain = Erik Akia
|email = 4kwlaser@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

== Classes ==
Certifications will cost $400 (25% discount for members) and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

== Shop Fees ==

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

== Donations ==

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.

*Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.

*ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red-dot laser indicator).

=== Machine Safety ===

*Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.

*Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.

*As the 10.6μm wave length CO2 laser beam is not visible, the red-dot laser indicator beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.

*Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.

*If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.

*Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

=== Preparing Vector Files for Cutting ===
We use SheetCAM for our laser cutter CAM program. This program can be downloaded for free as a trial so makers can prepare their cuts on their own computers. The trial software is fully functional with the only limit being the 180 line .NC code output. TinkerMill has a licensed version of SheetCAM that allows you to import the .job file from your computer so that a full .NC cut file can be created. Link to download SheetCAM: https://sheetcamshop.myshopify.com//pages/download-sheetcam. SheetCAM accepts .DXF and .SVG files from any CAD program.

==== Preparing .SVG Files With Inkscape ====
[[Preparing Files With Inkscape]]

== Operating the Laser ==

=== Start up ===

# Turn ON the wall switches for the exhaust fans. [[File:4KW Exhaust Fan Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi if needed for cutting thicker materials. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW Control Panel 1.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW_Control_Panel_Key.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START yellow when on). [[File:4KW_Parameter_Button.jpg]] [[File:4KW_Chiller_On.jpg]]
# Wait for chiller/heater to cool/heat to target temps. [[File:4KW_Chiller_1.JPG]]
# Press Laser Ready button. Laser light will flash and you will hear the resonator spin up. [[File:4KW_Laser_Ready.JPG]]

=== Shut Down ===
# Press Laser Ready button off. Laser light will start flashing. Wait at least 2 minutes for the resonator and cooling system to complete their internal shutdown sequence. [[File:4KW_Laser_Ready.JPG]]
# Turn OFF the chiller/heater unit from the Parameter screen. (CLG UNIT START blue when off). [[File:4KW_Parameter_Button.jpg]] [[File:4KW_Chiller_On.jpg]]
# Press the ALL ZERO + SAFETY SWITCH buttons to move laser bed to the load position. [[File:4KW_All_Zero.jpg]]
# Press the CLAMP button to unclamp the work piece and remove materials. Press Clamp button again to lower clamps. [[File:4KW_Clamp_Button.jpg]]
# Turn the READY key switch to the OFF Position, remove and return to toolbox. [[File:4KW_Control_Panel_Key.JPG]]
# Press the red OFF button of the control panel. Wait for the screen to go completely blank[[File:4KW_Control_Panel_OFF_Button.JPG]]
# Using gloves, close the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Using gloves, close the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, adjust the Nitrogen Gas Pressure Builder valve to adjust below 350 psi. [[File:4KW_Nitrogen_Pressure.JPG]]
# Unplug the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Turn OFF the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Turn OFF the wall switches for the exhaust fans. [[File:4KW Exhaust Fan Switches.jpg]]

=== See Also ===

File:4KW Nitrogen Pressure.JPG

2025-06-28T16:59:24Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Nitrogen Pressure.JPG

File:4KW Laser Ready.JPG

2025-06-22T19:02:30Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Laser Ready.JPG

File:4KW Nitrogen Main.JPG

2025-06-22T18:10:36Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Nitrogen Main.JPG

4KW Laser

2025-06-21T18:58:35Z

Neil.gabriel: /* Shut Down */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|captain = Erik Akia
|email = 4kwlaser@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

== Classes ==
Certifications will cost $400 (25% discount for members) and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

== Shop Fees ==

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

== Donations ==

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.

*Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.

*ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red-dot laser indicator).

=== Machine Safety ===

*Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.

*Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.

*As the 10.6μm wave length CO2 laser beam is not visible, the red-dot laser indicator beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.

*Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.

*If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.

*Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

== Operating the Laser ==

=== Start up ===

# Turn ON the wall switches for the exhaust fans. [[File:4KW Exhaust Fan Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi if needed for cutting thicker materials. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW Control Panel 1.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW_Control_Panel_Key.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START yellow when on). [[File:4KW_Parameter_Button.jpg]] [[File:4KW_Chiller_On.jpg]]
# Wait for chiller/heater to cool/heat to target temps. [[File:4KW_Chiller_1.JPG]]
# Press Laser Ready button. Laser light will flash and you will hear the resonator spin up. [[File:4KW_Laser_Ready.JPG]]

=== Shut Down ===
# Press Laser Ready button off. Laser light will start flashing. Wait at least 2 minutes for the resonator and cooling system to complete their internal shutdown sequence. [[File:4KW_Laser_Ready.JPG]]
# Turn OFF the chiller/heater unit from the Parameter screen. (CLG UNIT START blue when off). [[File:4KW_Parameter_Button.jpg]] [[File:4KW_Chiller_On.jpg]]
# Press the ALL ZERO + SAFETY SWITCH buttons to move laser bed to the load position. [[File:4KW_All_Zero.jpg]]
# Press the CLAMP button to unclamp the work piece and remove materials. Press Clamp button again to lower clamps. [[File:4KW_Clamp_Button.jpg]]
# Turn the READY key switch to the OFF Position, remove and return to toolbox. [[File:4KW_Control_Panel_Key.JPG]]
# Press the red OFF button of the control panel. Wait for the screen to go completely blank[[File:4KW_Control_Panel_OFF_Button.JPG]]
# Using gloves, close the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Using gloves, close the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, adjust the Nitrogen Gas Pressure Builder valve to adjust below 350 psi. [[File:4KW_Nitrogen_Pressure.JPG]]
# Unplug the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Turn OFF the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Turn OFF the wall switches for the exhaust fans. [[File:4KW Exhaust Fan Switches.jpg]]

=== See Also ===

4KW Laser

2025-06-21T18:55:54Z

Neil.gabriel: /* Operating the Laser */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|captain = Erik Akia
|email = 4kwlaser@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

== Classes ==
Certifications will cost $400 (25% discount for members) and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

== Shop Fees ==

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

== Donations ==

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.

*Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.

*ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red-dot laser indicator).

=== Machine Safety ===

*Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.

*Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.

*As the 10.6μm wave length CO2 laser beam is not visible, the red-dot laser indicator beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.

*Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.

*If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.

*Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

== Operating the Laser ==

=== Start up ===

# Turn ON the wall switches for the exhaust fans. [[File:4KW Exhaust Fan Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi if needed for cutting thicker materials. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW Control Panel 1.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW_Control_Panel_Key.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START yellow when on). [[File:4KW_Parameter_Button.jpg]] [[File:4KW_Chiller_On.jpg]]
# Wait for chiller/heater to cool/heat to target temps. [[File:4KW_Chiller_1.JPG]]
# Press Laser Ready button. Laser light will flash and you will hear the resonator spin up. [[File:4KW_Laser_Ready.JPG]]

=== Shut Down ===
# Press Laser Ready button off. Laser light will start flashing. Wait at least 2 minutes for the resonator and cooling system to complete their internal shutdown sequence. [[File:4KW_Laser_Ready.JPG]]
# Turn OFF the chiller/heater unit from the Parameter screen. (CLG UNIT START blue when off). [[File:4KW_Parameter_Button.jpg]] [[File:4KW_Chiller_On.jpg]]
# Press the ALL ZERO + SAFETY SWITCH buttons to move laser bed to the load position. [[File:4KW_All_Zero.jpg]]
# Press the CLAMP button to unclamp the work piece and remove materials. [[File:4KW_Clamp_Button.jpg]]
# Turn the READY key switch to the OFF Position, remove and return to toolbox. [[File:4KW_Control_Panel_Key.JPG]]
# Press the red OFF button of the control panel. Wait for the screen to go completely blank[[File:4KW_Control_Panel_OFF_Button.JPG]]
# Using gloves, close the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Using gloves, close the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, adjust the Nitrogen Gas Pressure Builder valve to adjust below 350 psi. [[File:4KW_Nitrogen_Pressure.JPG]]
# Unplug the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Turn OFF the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Turn OFF the wall switches for the exhaust fans. [[File:4KW Exhaust Fan Switches.jpg]]

=== See Also ===

4KW Laser

2025-06-21T18:52:23Z

Neil.gabriel: /* Start up */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|captain = Erik Akia
|email = 4kwlaser@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

== Classes ==
Certifications will cost $400 (25% discount for members) and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

== Shop Fees ==

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

== Donations ==

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.

*Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.

*ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red-dot laser indicator).

=== Machine Safety ===

*Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.

*Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.

*As the 10.6μm wave length CO2 laser beam is not visible, the red-dot laser indicator beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.

*Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.

*If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.

*Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

== Operating the Laser ==

=== Start up ===

# Turn ON the wall switches for the exhaust fans. [[File:4KW Exhaust Fan Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi if needed for cutting thicker materials. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW Control Panel 1.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW_Control_Panel_Key.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START yellow when on). [[File:4KW_Parameter_Button.jpg]] [[File:4KW_Chiller_On.jpg]]
# Wait for chiller/heater to cool/heat to target temps. [[File:4KW_Chiller_1.JPG]]
# Press Laser Ready button. Laser light will flash and you will hear the resonator spin up. [[File:4KW_Laser_Ready.JPG]]

=== Shut Down ===
# Press Laser Ready button off. Laser light will start flashing. Wait at least 2 minutes for the resonator and cooling system to complete their internal shutdown sequence. [[File:4KW_Laser_Ready.JPG]]
# Turn OFF the chiller/heater unit from the Parameter screen. (CLG UNIT START blue when off). [[File:4KW_Parameter_Button.jpg]] [[File:4KW_Chiller_On.jpg]
# Press the ALL ZERO + SAFETY SWITCH buttons to move laser bed to the load position. [[File:4KW_All_Zero.jpg]]
# Press the CLAMP button to unclamp the work piece and remove materials. [[File:4KW_Clamp_Button.jpg]]
# Turn the READY key switch to the OFF Position, remove and return to toolbox. [[File:4KW_Control_Panel_Key.JPG]]
# Press the red OFF button of the control panel. Wait for the screen to go completely blank[[File:4KW_Control_Panel_OFF_Button.JPG]]
# Using gloves, close the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Using gloves, close the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, adjust the Nitrogen Gas Pressure Builder valve to adjust below 350 psi. [[File:4KW_Nitrogen_Pressure.JPG]]
# Unplug the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Turn OFF the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Turn OFF the wall switches for the exhaust fans. [[File:4KW Exhaust Fan Switches.jpg]]

=== See Also ===

File:4KW Control Panel OFF Button.JPG

2025-06-21T18:43:57Z

Neil.gabriel:

File:4KW Clamp Button.jpg

2025-06-21T18:34:45Z

Neil.gabriel:

File:4KW All Zero.jpg

2025-06-21T18:26:34Z

Neil.gabriel:

File:4KW Laser Ready.JPG

2025-06-21T18:16:04Z

Neil.gabriel:

File:4KW Chiller 1.JPG

2025-06-21T18:10:40Z

Neil.gabriel:

File:4KW Chiller On.jpg

2025-06-21T18:07:59Z

Neil.gabriel:

File:4KW Parameter Button.jpg

2025-06-21T18:06:44Z

Neil.gabriel:

4KW Laser

2025-06-21T16:52:39Z

Neil.gabriel: /* Operating the Laser */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|captain = Erik Akia
|email = 4kwlaser@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

== Classes ==
Certifications will cost $400 (25% discount for members) and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

== Shop Fees ==

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

== Donations ==

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.

*Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.

*ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red-dot laser indicator).

=== Machine Safety ===

*Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.

*Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.

*As the 10.6μm wave length CO2 laser beam is not visible, the red-dot laser indicator beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.

*Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.

*If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.

*Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

== Operating the Laser ==

=== Start up ===

# Turn on the wall switches for the exhaust fans. [[File:4KW Exhaust Fan Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi if needed for cutting thicker materials. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW Control Panel 1.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW_Control_Panel_Key.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START).
#

=== See Also ===

File:4KW Control Panel Key.JPG

2025-06-21T16:40:58Z

Neil.gabriel:

4KW Laser

2025-06-21T05:47:16Z

Neil.gabriel: /* Operating the Laser */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|captain = Erik Akia
|email = 4kwlaser@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

== Classes ==
Certifications will cost $400 (25% discount for members) and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

== Shop Fees ==

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

== Donations ==

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.

*Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.

*ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red-dot laser indicator).

=== Machine Safety ===

*Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.

*Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.

*As the 10.6μm wave length CO2 laser beam is not visible, the red-dot laser indicator beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.

*Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.

*If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.

*Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

== Operating the Laser ==

=== Start up ===

# Turn on the wall switches for the exhaust fans. [[File:4KW Exhaust Fan Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi if needed for cutting thicker materials. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW_Control_Panel.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW Control Panel 1.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START).
#

=== See Also ===

File:4KW Exhaust Fan Switches.jpg

2025-06-21T05:45:22Z

Neil.gabriel: Neil.gabriel reverted File:4KW Exhaust Fan Switches.jpg to an old version

File:4KW Exhaust Fan Switches.jpg

2025-06-21T05:42:59Z

Neil.gabriel: Neil.gabriel reverted File:4KW Exhaust Fan Switches.jpg to an old version

File:4KW Exhaust Fan Switches.jpg

2025-06-21T05:39:20Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Exhaust Fan Switches.jpg

File:4KW Resonator Switch.JPG

2025-06-21T05:38:17Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Resonator Switch.JPG

File:4KW Oxygen Main.JPG

2025-06-21T05:37:11Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Oxygen Main.JPG

File:4KW Chiller.JPG

2025-06-21T05:36:27Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Chiller.JPG

File:4KW Control Panel 1.JPG

2025-06-21T05:35:24Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Control Panel 1.JPG

File:4KW Dust Collector.JPG

2025-06-21T05:33:54Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Dust Collector.JPG

4KW Laser

2025-06-20T12:51:11Z

Neil.gabriel:

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|captain = Erik Akia
|email = 4kwlaser@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

== Classes ==
Certifications will cost $400 (25% discount for members) and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

== Shop Fees ==

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

== Donations ==

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.

*Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.

*ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red-dot laser indicator).

=== Machine Safety ===

*Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.

*Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.

*As the 10.6μm wave length CO2 laser beam is not visible, the red-dot laser indicator beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.

*Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.

*If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.

*Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

== Operating the Laser ==

=== Start up ===

# Turn on the wall switches for the exhaust fans. [[File:4KW_Exhaust_Fan_Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi if needed for cutting thicker materials. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW_Control_Panel.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW Control Panel 1.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START).
#

=== See Also ===

4KW Laser

2025-06-20T12:30:35Z

Neil.gabriel: /* Classes */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|colors =  
 
|captain = Erik Akia
|email = rapidpro@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

=== Classes ===
Certifications will cost $400 (25% discount for members) and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

=== Shop Fees ===

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

=== Donations ===

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*'''The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.'''

*'''Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.'''

*'''ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red).'''

=== Machine Safety ===

*'''Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.'''

*'''Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.'''

*'''As the 10.6μm wave length CO2 laser beam is not visible, the visible laser beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.'''

*'''Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.'''

*'''If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.'''

*'''Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.'''

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

=== Operating the Laser ===

# Turn on the wall switches for the exhaust fans. [[File:4KW_Exhaust_Fan_Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi if needed for cutting thicker materials. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW_Control_Panel.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW Control Panel 1.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START).
#

=== See Also ===

4KW Laser

2025-06-19T04:47:03Z

Neil.gabriel: /* Operating the Laser */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|colors =  
 
|captain = Erik Akia
|email = rapidpro@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

=== Classes ===
Certifications will cost $300 and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

=== Shop Fees ===

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

=== Donations ===

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*'''The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.'''

*'''Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.'''

*'''ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red).'''

=== Machine Safety ===

*'''Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.'''

*'''Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.'''

*'''As the 10.6μm wave length CO2 laser beam is not visible, the visible laser beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.'''

*'''Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.'''

*'''If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.'''

*'''Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.'''

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

=== Operating the Laser ===

# Turn on the wall switches for the exhaust fans. [[File:4KW_Exhaust_Fan_Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi if needed for cutting thicker materials. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW_Control_Panel.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW Control Panel 1.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START).
#

=== See Also ===

4KW Laser

2025-06-19T04:45:29Z

Neil.gabriel: /* Operating the Laser */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|colors =  
 
|captain = Erik Akia
|email = rapidpro@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

=== Classes ===
Certifications will cost $300 and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

=== Shop Fees ===

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

=== Donations ===

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*'''The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.'''

*'''Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.'''

*'''ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red).'''

=== Machine Safety ===

*'''Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.'''

*'''Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.'''

*'''As the 10.6μm wave length CO2 laser beam is not visible, the visible laser beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.'''

*'''Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.'''

*'''If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.'''

*'''Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.'''

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

=== Operating the Laser ===

# Turn on the wall switches for the exhaust fans. [[File:4KW_Exhaust_Fan_Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW_Control_Panel.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW Control Panel 1.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START).
#

=== See Also ===

File:4KW Nitrogen Pressure.JPG

2025-06-18T22:39:03Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Nitrogen Pressure.JPG

File:4KW Nitrogen Pressure.JPG

2025-06-18T22:35:04Z

Neil.gabriel:

File:4KW Laser Gas.JPG

2025-06-18T22:33:42Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Laser Gas.JPG

File:4KW Dust Collector.JPG

2025-06-18T22:31:49Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Dust Collector.JPG

4KW Laser

2025-06-18T22:24:50Z

Neil.gabriel: /* Operating the Laser */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|colors =  
 
|captain = Erik Akia
|email = rapidpro@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

=== Classes ===
Certifications will cost $300 and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

=== Shop Fees ===

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

=== Donations ===

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*'''The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.'''

*'''Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.'''

*'''ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red).'''

=== Machine Safety ===

*'''Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.'''

*'''Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.'''

*'''As the 10.6μm wave length CO2 laser beam is not visible, the visible laser beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.'''

*'''Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.'''

*'''If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.'''

*'''Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.'''

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

=== Operating the Laser ===

# Turn on the wall switches for the exhaust fans. [[File:4KW_Exhaust_Fan_Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:4KW Resonator Switch.JPG]]
# Plug in the extension cord for the dust collector. [[File:4KW Dust Collector.JPG]]
# Confirm the main valve on the Laser Gas mix bottle is open. [[File:4KW_Laser_Gas.JPG]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:4KW_Nitrogen_Main.JPG]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi. [[File:4KW_Nitrogen_Pressure.JPG]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:4KW_Oxygen_Main.JPG]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:4KW_Chiller.JPG]]
# Press the green ON button of the control panel. [[File:4KW_Control_Panel.JPG]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:4KW Control Panel 1.JPG]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START).
#

=== See Also ===

File:4KW Control Panel 1.JPG

2025-06-18T22:23:54Z

Neil.gabriel:

File:4KW Control Panel.JPG

2025-06-18T22:21:06Z

Neil.gabriel:

File:4KW Chiller.JPG

2025-06-18T22:16:38Z

Neil.gabriel:

File:4KW Oxygen Main.JPG

2025-06-18T22:12:40Z

Neil.gabriel:

File:4KW Nitrogen Main.JPG

2025-06-18T22:05:54Z

Neil.gabriel:

File:4KW Laser Gas.JPG

2025-06-18T22:01:14Z

Neil.gabriel:

File:4KW Dust Collector.JPG

2025-06-18T22:00:04Z

Neil.gabriel:

File:4KW Resonator Switch.JPG

2025-06-18T21:45:14Z

Neil.gabriel:

4KW Laser

2025-06-18T21:22:30Z

Neil.gabriel: /* Operating the Laser */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|colors =  
 
|captain = Erik Akia
|email = rapidpro@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

=== Classes ===
Certifications will cost $300 and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

=== Shop Fees ===

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

=== Donations ===

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*'''The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.'''

*'''Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.'''

*'''ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red).'''

=== Machine Safety ===

*'''Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.'''

*'''Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.'''

*'''As the 10.6μm wave length CO2 laser beam is not visible, the visible laser beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.'''

*'''Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.'''

*'''If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.'''

*'''Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.'''

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

=== Operating the Laser ===

# Turn on the wall switches for the exhaust fans. [[File:4KW_Exhaust_Fan_Switches.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:Lightburn Laser Tab.jpg]]
# Plug in the extension cord for the dust collector. [[File:Lightburn Laser Tab.jpg]]
# Confirm the main valve on the Laser Gas mix bottle is open. [[File:Lightburn Laser Tab.jpg]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:Lightburn Laser Tab 1.jpg]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi. [[File:Lightburn Laser Tab.jpg]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:Lightburn Laser Tab.jpg]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:Lightburn Laser Tab.jpg]]
# Press the green ON button of the control panel. [[File:Rabbit Panel 3.jpg]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:Lightburn Laser Tab.jpg]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START). [[File:Lightburn Laser Tab.jpg]]
#

=== See Also ===

File:4KW Exhaust Fan Switches.jpg

2025-06-18T21:21:20Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Exhaust Fan Switches.jpg

File:4KW Exhaust Fan Switches.jpg

2025-06-18T21:19:42Z

Neil.gabriel: Neil.gabriel uploaded a new version of File:4KW Exhaust Fan Switches.jpg

File:4KW Exhaust Fan Switches.jpg

2025-06-18T21:15:01Z

Neil.gabriel:

4KW Laser

2025-06-18T21:02:50Z

Neil.gabriel: /* Operating the Laser */

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|colors =  
 
|captain = Erik Akia
|email = rapidpro@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

=== Classes ===
Certifications will cost $300 and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

=== Shop Fees ===

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

=== Donations ===

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*'''The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.'''

*'''Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.'''

*'''ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red).'''

=== Machine Safety ===

*'''Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.'''

*'''Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.'''

*'''As the 10.6μm wave length CO2 laser beam is not visible, the visible laser beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.'''

*'''Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.'''

*'''If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.'''

*'''Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.'''

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

=== Operating the Laser ===

# Turn on the wall switches for the exhaust fans. [[File:Lightburn Laser Tab.jpg]]
# Turn ON the main power supply circuit breaker on the Laser Resonator. [[File:Lightburn Laser Tab.jpg]]
# Plug in the extension cord for the dust collector. [[File:Lightburn Laser Tab.jpg]]
# Confirm the main valve on the Laser Gas mix bottle is open. [[File:Lightburn Laser Tab.jpg]]
# Using gloves, open the main valve on the Nitrogen Assist Gas dewar. [[File:Lightburn Laser Tab 1.jpg]]
# Using gloves, open the Nitrogen Gas Pressure Builder valve to adjust above 350 psi. [[File:Lightburn Laser Tab.jpg]]
# Using gloves, open the main valve on the Oxygen Assist Gas dewar [[File:Lightburn Laser Tab.jpg]]
# Ensure the green and red reading on the chiller/heater are on. Red is current reading and green is target reading. [[File:Lightburn Laser Tab.jpg]]
# Press the green ON button of the control panel. [[File:Rabbit Panel 3.jpg]]
# Retrieve the machine key from the toolbox, insert in control panel and turn the READY key switch to the ON Position. [[File:Lightburn Laser Tab.jpg]]
# Turn ON the chiller/heater unit from the Parameter screen. (CLG UNIT START). [[File:Lightburn Laser Tab.jpg]]
#

=== See Also ===

4KW Laser

2025-06-18T05:35:03Z

Neil.gabriel:

{{ShopInfoBox
|title = 4KW Laser Shop
|image=TM_4KW.jpg
|location = Southwest corner outside of the main building known as W
|colors =  
 
|captain = Erik Akia
|email = rapidpro@tinkermill.org
|slackchannel = #4KW Laser
|fees = <div style='padding-left:10px'>
<ul><li> $1.33 per minute of laser on time<li></ul></div>
}}

== Note ==
This page is under construction. Please contact neil.gabriel@tinkermill.org with comments and/or suggestions.

== General ==
We were donated a Mitsubishi ML2512HV 4kw CO2 laser in 2023, members donated to upgrade our power to use it, and we are currently working toward finishing the final phases of that goal. Please be patient with us as it gets powered and as we integrate it into TinkerMill. We’re getting close!

=== Classes ===
Certifications will cost $300 and consist of two classes. The first class will cover computer work, file creation, post-processing, G-code, M-code, and loading .nc files onto the laser. The second class will focus on shop policy, safety, and the operation of the laser with various materials. You will receive the Laser Trainee designation after completing the two certification classes. 

While a Laser Trainee, you must have an approved mentor present when using the laser until you advance to Laser Tech. The mentor will assist you if needed and assess whether you are ready to advance. The criteria for advancement will include safe operation and whether you still require the mentor’s help for essential tasks and information acquisition. We do not expect you to know everything to advance, but you should be able to use the machine safely and approach any issues or gaps in knowledge in a manner that does not endanger you or the machine. The certification fee will cover your first two hours with a mentor during your initial session, and subsequent hours will cost $25 each.

=== Shop Fees ===

All TinkerMill shops are self-funded and do not receive a portion of membership dues. Both members and non-members are required to pay for time spent in the shop and for materials that are used. The shop fees help pay for equipment maintenance and repair, shop supplies, and the purchase of new tools and equipment. The current rates are shown in the Info Box on this page (top-right corner) and are posted on a sign in the shop.

Payments by cash or check can be placed in the blue box in the shop. Please use one of the envelopes provided and write your name, the amount, and that it is for 4Kw Laser Shop before depositing in the box. Payments can also be made electronically via Venmo or at the kiosk at the front office.

The laser usage fee will be based on the laser-on time at $1.33 per minute. This rate may fluctuate as we better understand usage and costs as more people begin using the machine.

=== Donations ===

Cash donations are appreciated and accepted at any time. Payments can be made as described above for shop fees.

Donations of equipment must be approved by the Executive Director. Do not leave unapproved donations in the shop. Unwanted donations may be disposed of at the discretion of the shop captain and may be offered to the membership, donated to charity, or thrown away.

Below are some items that we could use in the shop. If you have any of these items to donate, please contact a shop captain:

== Equipment ==

Below is a list of some of the equipment, tools, and supplies in the 4Kw Laser Shop. The shop has many additional tools and supplies that are too numerous to list.

We are always open to suggestions for other tools and supplies that would help to make the shop more useful. If you have something that you would like to donate, please contact a shop captain or the TinkerMill executive director first to discuss your donation. See the [[#Donations]] section above for more info.

==Overview==
=== Specifications ===
'''Laser Model:''' Mitsubishi ML2512HV (4kw CO2 laser) 
'''Working area:''' 2400 x 1200 mm (96 x 48 inches) 
'''Laser Kerf Width:''' 0.1524 mm (.006 inches) 
'''Torch Height Control (metals only)''' 

=== Parts of the Laser ===
'''4000 Watt laser tube''' - The laser tube lives in the Resonator. This generates a beam of unfocused infrared radiation. 
'''Mirrors''' - Mirrors are located in the Resonator and on the Y carriage of this laser. They reflect the beam from the tube to the focal assembly or torch head. 
'''Focal assembly''' - This is the business end of the laser. This assembly contains the focusing lens, the auto-focus assembly, red-dot laser indicator. 
'''Auto-focus assembly''' - This laser is equipped with an auto-focusing area that allows it to touch off of a permanent surface and move itself into an optimal focal range. 
'''Y carriage''' - the Focal Assembly moves with the Y axis to position the Focal assembly (towards or away from the control panel). 
'''X carriage''' - the laser bed moves with the X axis to position the work piece under the Focal assembly (left to right as viewed from the control panel). 
'''Z-axis''' - the Focal assembly is moved vertically along the Z axis. 
'''Laser bed''' - The bed supports your material while also allowing exhaust to be pulled through the bed of the laser. 
'''Chiller/Heater''' - A chiller constantly circulates cooled water through the outer layers of the laser tube to help prevent the tube from overheating and cracking. 

==Safety==

*'''The high power laser beam can cause injury to the eye or burns if it is irradiated on the human body.'''

*'''Special care is necessary as the CO2 laser beam is an invisible far red infrared radiation having a 10.6μm wavelength. If the direct or reflective laser beam should contact the eyes or skin, damage to vision or burns could result, so never radiate the beam on the human body.'''

*'''ALWAYS WEAR THE PROVIDED SAFETY GLASSES ANY TIME THE LASER MACHINE HAS BEEN TURNED ON. Note that the laser beam (CO2) cannot be completely shielded even when wearing protective goggles or a protector. This also applies to the visible beam (red).'''

=== Machine Safety ===

*'''Do not open any section of the beam passage (beam duct, bend mirror, etc.), when radiating the laser beam.'''

*'''Before disassembling or inspecting the processing head and the bend mirror holder (removal, installation, etc., of nozzle, processing lens and bend mirror), stop the oscillation. Also, be sure to close the beam shutter that is provided at the outlet of the CO2 laser.'''

*'''As the 10.6μm wave length CO2 laser beam is not visible, the visible laser beam (power : approx. 1 mW) is used to adjust the beam axis. However, the visible laser beam must not enter the eye because it also will cause damage to vision.'''

*'''Take special care to secondary reflection from metal surfaces. Especially take care when cutting copper or aluminum work pieces.'''

*'''If cutting chips or dust accumulate on the conveyor, exhaust duct or dust collector installed below the work table, the spatter and the beam could come in contact and start a fire. Thus, always remove these periodically and clean completely.'''

*'''Do not place flammable materials, explosive chemicals or gas cylinder around the laser processing system.'''

==Usage==
=== Scheduling Time on the Laser Cutter ===
The 4Kw Laser is a new tool here at TinkerMill, thus a [[Resource Scheduling| Resource scheduling and reservation system ]] has been set up with [http://calendar.google.com/calendar/u/1/r?cid=tinkermill.org_2d38363532353539342d343234@resource.calendar.google.com Google Calendar].

=== Operating the Laser ===

# Load file into Lightburn software.
# Turn the laser on using the key on the main control panel. Check to ensure that the Chiller, Air Assist Pump, and Ventilation Fan have all turned on. '''If any of these systems do not turn on, do not use the machine!'''
# Wait for the laser to complete its initialization process and has stopped moving prior to loading any materials into the bed.
# In Lightburn use the "Send" button in the Laser tab of the windows in the lower right to send your file to the cutter. Please leave "LGHTBRN" as the name of the file you send to the laser, and overwrite any existing "LGHTBRN" file.[[File:Lightburn Laser Tab.jpg]] [[File:Lightburn Laser Tab 1.jpg]]
# Scan your badge using the [[TinkerAccess]] kiosk above the main control panel. The laser tube cannot fire if a certified user is not signed in. If additional time is required users may re-scan at any point to extend the session.
# Place your material onto the laser cutter bed.
# (Refer to picture of laser control panel below) The directional keys on the key pad are used to position the laser cutter's focal head. If the bed height needs to be adjusted this can be done by pressing the "Z/U" button on the keypad and with "Z MOVE" highlighted pressing the Right arrow to move the bed down, or the Left arrow to move the bed up. [[File:Rabbit Panel 3.jpg]]
# Once the focal head is correctly positioned relative to your material, press the "ORIGIN" button on the keypad to lock in its current location as the origin point for your job.
# Press the “FILE” button to load the file to the laser cutter’s memory
# At this point "FRAME" can be used to physically outline the outer-bounds of the work area for your job. The laser head will travel in a rectangular pattern that represents the boundaries of your file.
# Now move the laser head so that the auto-focus probe is positioned directly above your material. Press the "Z/U" button and navigate to "AUTOFOCUS" and press "ENTER". It is '''crucial''' that the probe contact your material or the laser head may impact the bed and compress the focal tube. If you are going to miss your material with the auto-focus probe use the "ESC" key to stop the auto-focus process, or use the emergency stop to prevent the crash.
# You are now ready to cut/engrave! Press the “START” key to start the laser from your previously declared origin point.
# Monitor your job closely. If you want to inspect the quality of your cuts and engraves mid run you may do so by pressing the "Start-Pause" button. If you open the lid without pausing the run it will interrupt the beam but continue its motion.
# Listen for a loud beep to indicate that your job is done.
# Move the laser head back to the right rear corner and press "ORIGIN".
# Remove your material as well as any left over pieces. Don’t worry about scrap that falls through the the honeycomb, that gets cleaned out during maintenance. Do, however, remove any scrap that sits on or above the honeycomb that could obstruct material placed into the machine later. The vacuum cleaner next to the laser cutter works great for sucking up loose bits!
# Close lightburn if you are finished cutting.
# Donate money for the laser cutter based on the suggested rate and the elapsed time it took to run, according to the time displayed on the laser cutter. Suggested rate is currently $0.16/min or $10.00/hr. Using the Lightburn preview display, you can see the elapsed time for the project to engrave and cut. You need only pay for the time the laser is actually on.

=== See Also ===

4KW Laser

2025-06-18T05:29:03Z

Neil.gabriel: /* Scheduling Time on the Laser Cutter */

4KW Laser

2025-06-18T05:27:46Z

Neil.gabriel: /* Scheduling Time on the Laser Cutter */