Smoothieware is easier to config and install in my opinion. There really isn’t a reason to use Marlin for laser control unless the speed can be improved. I was hoping to see a increase in raster engraving speed. This is limited to about 150mm/sec on a K40 laser. Greyscale raster scanning speed using marlin is no better than smoothieware. This G21 gcode sets the controller to millimeters, which is default anyway. Marlin responds with a echo:Unknown command: “G21” in the terminal window when a laser job is started. The current configuration uses the M106 fan output to control laser PWM power. I used Lightburn Laser software to control the Re-ARM/Marlin. Set the default steps per mm to match K40 laser settings Set the first temp sensor dummy reading so it always reads 210C Click on link to download my edited version. Some minor changes to the configuration.h.

This is my custom compiled firmware if you don’t want to make your own version.

I used these instructions on how to compile Marlin using PlatformIO. Testing out the latest 32bit Marlin2.0 using the Panucatt Re-ARM controller.

Download lightburn ramps 1.4