Error Codes 9 and 20

[ednisley]

@Jack2

error codes 20

This usually happens when you’ve selected the wrong device type, causing LightBurn to send codes that the real device can’t handle.

This thread may help:

LightBurn generates an illegal GRBL code for my AtomStack A10 Pro (GRBL 1.1h)

When I draw a simple test pattern in LightBurn and run, I get an error 20 (near line 0). The code at the top of the file is M101 Pxxxx, where xxxx varies. M101 is “turn extruder on”, I’m using a laser cutter. When I comment that line out, everything is fine. I can’t find anywhere in setup where I can tell LightBurn that this is a laser, not a 3D printer. How can I fix this? Thanks Mark