| Hot nozzle next to a plastic mount and the operator's fingers |
Hotend below 50 C before fitting or removing the holder |
| Heater left on in cutter mode |
CUTTER_MODE runs M104 S0 and M140 S0; the preprocessor removes all heater commands |
| Blade plunging in printer mode |
CUT_PLUNGE refuses unless mode is cutter and all axes are homed |
| Nozzle crashing into the mat |
Knife tip must sit below the nozzle tip; see Mounting the knife |
| Two 5 V supplies back-feeding over USB |
Console cable only: block pin 1, see Wiring |
| Exposed blade |
Retract or cap the blade when the holder is off the machine |
| Printing over a mounted knife |
Always remove the holder before printing; PRINTER_MODE reminds you |