Hi Guys,
I have a friend that has a 130w 1390 chinese laser running Ruida controller and Lightburn, they have noticed that when they move the bed Up/Down the laser will pulse, just once and at random
I checked the PSU to see if maybe the fuse was damaged but its good and running a 15A Fuse
The likely have the wires for the Z motor really close to the high-voltage supply L-On or PWM wire input - it could be inducing voltage into that wire, or they could actually have a short or crossed wire in there somewhere.
Ryan, Didn’t think of this when i was trying to help with this issue on another platform. Oz Is Correct and im 99% sure this is what the issue is unless there is a short inside the controller of some strange place- Brandon Teater