My cutter (a 7040 from China, Ruida controller) has just started making a crackling/arcing noise in the middle of a cut. It sounded like welding - sparks cracking, but quietly. Only occurs when the laser is on.
Does anyone know what this could indicate? I won’t have time to investigate for a week or so but any early heads-up would be appreciated.
edit: I’ve quickly checked the tube and all seems intact. The electronics hatch looks fine and smells sparky, but the cutter will need totally moving in order to make the hatch accessible so I can’t do a full look.