I modded my K40 Laser to run from an Arduino Mega 2560 with a

Lasers
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I modded my K40 Laser to run from an Arduino Mega 2560 with a RAMPS 1.4 board. I’m currently using pronterface to push the G-code to the laser, but I can also save the G-code on the SD-card to let the laser run independently.

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Welcome Eric, and thank you for sharing your experience.

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Hi Eric,

I am just preparing to do the same - which software are you using ?

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I’m using a modified version of Marlin. The version I’m using came from here … http://3dprintzothar.blogspot.com/2014/08/40-watt-chinese-co2-laser-upgrade-with.html