Error: Gcode word repeated and engraving a line through my project before stopping

[misken (Melvin)]

@RunemaneCreations

I noticed sometimes when stopping a project I would receive this error message:
Your Grbl may not support Variable Power mode (M4)
If your laser does not turn off between cuts,
switch to the GRBL-M3 device

This means the connection has been reset and LB initiates a new connection to the laser. Since the laser does not report a version string that is recognized, it gives this warning. This can be ignored usually.

@RunemaneCreations

My laser does turn off between cuts, but I tried disabling “constant power mode” in my layers and I have now successfully completed 3 runs of this project without any errors or stopping.

This should not be related to your issue; I suspect this was just luck.

grbl-m3 is a device type, not an option. You need to change the laser type to grbl-m3. But this is most likely incorrect, since grbl-m3 is only for firmwares that are older than 6-7 years, which is not the case. Your firmware is much newer.

[RunemaneCreations (Jackie)]

@misken

@RunemaneCreations

My laser does turn off between cuts, but I tried disabling “constant power mode” in my layers and I have now successfully completed 3 runs of this project without any errors or stopping.

This should not be related to your issue; I suspect this was just luck.

Constant Power Mode on:
Fails: 8
Successes: 0

Constant Power Mode off:
Fails: 0
Successes: 6

Luck? Maybe but pretty unlikely at this point. I have no idea why this would be causing my issues but I haven’t had a failure with CPM off yet.

I have contacted my laser manufacturer Atomstack about it and will update anything I learn.

[MikeyH (Mike Hembrey)]

@RunemaneCreations

Constant Power Mode on:
Fails: 8
Successes: 0

Constant Power Mode off:
Fails: 0

This suggests an overheat problem, but does not tell us if it is the laser module, machine controller, or the power supply. It could even be a faulty connector that is heating up.