I edit the firmware on my 52x82 Lowrider2. And now have TTL control of a Eleksmaker 3.5 watt laser. [attachment file=106257] [attachment file=106258] [attachment file=106259] [attachment file=106260]
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Great. I think you may be one of the first to do this with one of the RAMBOs, or at least post about it. Did you remap one of the fan pins to a different gcode command, or is the fan control code changed in your gcode program for lasering?
The pin is shown on the ultimachine page and the laser page explains the options for control.
David I can;t wait to see what you are burning with that new giant build!