Alternate M code for laser TTL to use FAN1 in Marlin

LightBurn Hardware Compatibility Marlin
1

I am currently evaluating the latest trial version of lightburn and I am wondering if there is any way to change the M code that Lightburn uses to control the laser TTL. I have added a diode laser to my 3D printer as an accessory and it uses the FAN1 pin that I have assigned (FAN0 is already assigned to an onboard MOSFET that outputs 12v for a cooling fan, my laser TTl controller uses 5v logic). FAN1 is controlled via M106 P1 XXX. I am able to get this working by exporting the gcode and and using search/replace with notepad++ to append the “P1” but would like to be able to host my machine with Lightburn without using a level shifter. Perhaps I’ve overlooked something?

2

In Edit -> Device Settings you can change the tool index at the lower right, here:

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3

Wow, literally right under my nose! Thanks for the assist!

4

Not all of this stuff is obvious. In an effort to make things compact in the settings sometimes it makes things harder to find. You’re welcome. :slight_smile: