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http://reprap.org/wiki/Laser_Cutter
Re: Marlin firmware as laser cutter - 9 years ago
The D9 mosfet on the RAMPS board (all the mosfet's actually) switch the negative leg of the PS connector closest to the mosfets. I use a wall wart with 12v pos going to a relay board, and the negative of the wall wart tied to the negative terminal of the PS connectors on the RAMPS 1.4, the negative from the relay board goes to the D9 negative line of the screw connector. you could do the same tby Cromaglious - Laser Cutter Working Group
Re: What controller are you using on your chinese laser cutter? - 9 years ago
Using a Mega2560 with Ramps 1.4 with mono graphic LCD. Pronterface for sending G code -- Bit disappointed about Pronterface; doesn't show what you're cutting on the preview. Added white LED's to light the bed. I have a 2" and 4" lens, need to get another air assist nozzle or print one fror the 2" lens and the 4" lens. For cutting bed I have a piece of 3/4" plywood with 4 screws for leveling.by Cromaglious - Laser Cutter Working Group