I have an Elegoo Phecda 20W version. Have been using it for general hobby, several months and working fine.
Recently ~2-3 wks, it has a deadzone. In the X axis about 9" or 230mm, when the laser moves in this area, the emitter stops firing. The laser moves through the motions, but the diode turns off. The bed size is 400x400mm, and I typically use pre-cut sheets of birch ply ~3mm thickness ~12x12" in size or ~300x300mm. So, I know this is within the range of the laser.
I’ve added this picture below to show the area the laser stops working. I traced the outer boundary in red sharpie so this is what it should have filled in.
I’ve cleaned the laser really well and inspected the wiring harness, thinking maybe it has a short or something. But the harness looks good, the connectors on the control board are all plugged in securely.
My home origin is the bottom left, off the board. It travels to position correctly and starts cutting/engraving, but the diode turns off in this deadzone.
NOTE: Using Lightburn 1.6.03
I thought that may be an issue, but after inspecting the harness looks good, no frays, no exposed wires. I looked it over thoroughly under a magnifying glass to ensure the insulation was intact.
If I just use the laser on the far-left side ~9" of X workspace, it works fine. But when it traverses for a larger cut/engrave to the right, then it stops emitting. It moves, but the laser turns off until it’s back over the “safe area”.
