AENBUSLM 12V 5A 80w laser module not recognized by LightBurn or controller (turns on and off when the button pressed but never fires!)

LightBurn Hardware Compatibility GRBL
21

Most of this equipment uses a negative ground, so you’d wire the negative side to ground.

:smiley_cat:

22

Do not connect any output back to any input known as commons. A common is not necessarily a ground.