Alarm 3 Grlbl LPC Smoothieboard

So I’ve had a big issue lately where my laser will seemingly randomly stop in the middle of cuts with an alarm 3 and a restart to grbl. I’ve tried slowing it down, changing max speeds shorter usb cable and much more and the problem keeps coming up at random times. Sometimes at the beginning of a cut and sometimes when its almost done. any ideas?

Sounds like you might have a grounding or power related issue. Quick search and I found a few good posts from LaserGods that might help.

Yeah so i did some further digging and you led me on the right path, for some reason my water cooling was getting statically charged and i would get shocked if i touched the water so i grounded that to my frame and the problems seem to be gone.