Power modulation problem I think

[RoanokePhotog (Michael Sink)]

Oz,
could this be contributing to this issue? I’m using the GRBL setting instead of M3, I believe I tried it both ways but will switch back if you think it’s an issue, I’m running firmware 1.1f

Arduino GRBL controller + 15W laser = low power only in Lightburn

Use the GRBL-M3 device instead of ‘GRBL’ - you likely have an issue with your settings, either telling the machine to go much faster than the firmware is set to allow, or something like that, but using the M3 driver tells the controller to use constant power, and not adjust the power according to speed or limits.