Setting up Lightburn on my Marlin was a nightmare:
- the laser was recognized as a grbl M3 (that was wrong and I was just able to cut when I edited the gcode).
- I created an other laser in lightburn as a Marlin-device manually but was not able to connect to it (even by updating the drivers in Win11 and on the SRKpro-Board).
Solution: close Lightburn, open the Laser in PonterFace (!!!), close Ponterface and reopen Lightburn - then the Marlin was accepted and connected!!!