Machine: K40 - arrived with M2 Nano (ribbon cable)
Board: Cohesion3D Mini
Firmware: XYZA Smoothie
Problem/ Question: I apologize if this in in the instructions somewhere, but if it is, I seem to be missing it. I recently installed my Cohesion3d Mini board according to the ribbon cable instructions, and added an external 24v power supply per recommendations. I am unable to get the laser to fire via a job in Lightburn. The laser head moves as expected, but the laser doesn’t fire. However, the laser WILL fire via the test fire button which tells me that my laser hardware (tube, etc) is functioning.
I’ve had people suggest that I have a grounding issue and I’ve seen other posts such as this one that seems to indicate that I need to connect the “Laser Fire” and “Laser Gnd” wires from the original PSU to the Cohesion3D board. Is this true? My controller is one of the original boards that does not have the screw terminals next to the power plug. That said, I’m wondering if I need to connect the original power plug but remove/cut the 24v and 5v wires from the PSU connector? That would seem to be the easiest solution…or I could just add jumper wires between the board and PSU. Thoughts?
I also plan to mount the board to the K40 case using nylon standoffs (to isolate ground from the dirty K40 power) per recommendations in the ribbon cable installation instructions.