Filament runout switch from Creality endstop

thingiverse

Filament runout sensor works with standard Creality endstop switches. It prints easily, you may want to polish the roller a bit on the flat sides for a smoother action. Simply hangs on the filament, or could be mounted to your extrusion. The only extra hardware required is of course the creality microswitch and 2-4 m3 self tapping screws. Added a larger roller that may be used if you have excess shrinkage in your filament. roller should fit fairly snugly while still having freedom of motion. Scale in xy if necessary. feed it!