created: 2019/08 mod:2020/12

K40 40W CO2 Laser Cutter - Mods

After building some Laser engravers with small diode lasers i finally decided to buy one of these cheapo china 40W CO2 hellfire machines - knowing that they were dangerous in terms of bad electric, high voltages and powerful invisible laser rays.

As said, i knew of the existing problems but with my experience and some research i was confident to be able to deal with that.

K40 40W CO2 Laser Cutter from eBay i choose the orange one with the analog current meter, as i like the color and it was the cheapest ;_)

Once the machine was electrically secured, well grounded and unable to fire the laser with the lid opened i did some test cuts and started taking apart the whole thing to do the modifications i had in mind.

  • Extending the working area of the laser to the max possible within the steel case of the k40 (involves new mechanics and moving all electronics to the back)
  • Replace the control board by one that is working with grbl and Lasergrbl.
  • Change the water cooling to a closed system with a radiator to cool the water.

Parts for the new Mechanics

Aluminum Extrusion

MGN12 Linear Rails

Pulleys n Belts

Water Cooling

Air Assist

Z-Bed - never completed it...

Printed parts




First Testcuts

First Engravings


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I will release the plans for some build at some point in time, but again, please don't ask for unreleased plans, i don't want to get rushed ;-)

technik/k40laser.txt · Zuletzt geändert: 2020/12/16 von hermenj