I was in discussion with a different Stepcraft user a while back.
Follow the start of that discussion here:
Uccnc Lightburn support - LightBurn Software Questions [OFFICIAL] - LightBurn Software Forum
We continued in DM for a bit and arrived at this conclusion:
Based on the last test I think I have a procedure to make this work.
- Setup a device type as Marlin in LightBurn.
- In Device Settings make sure S Value Max is set to 255
- In Device Settings make sure to select M03/M05 for Laser Control Command
- Create your design, then push “Save GCode” in Laser window and select a filename
- Open the saved G-code in a text editor and make the following changes:
Replace all 'M05' with 'M11' Replace all 'M03 S' with 'M10Q' Add a line with just 'M3' before the first line with 'M11'
- Run g-code in your control software