Prusa Mk3s extruder using an indirect Mk3 filament sensor.

Fully tested now. I tested feeding in my hardest (PLA) and softest materials (TPU) and both fed through quite easily. First passes may be a bit rough due to layering. Might need to run a bit of filament through to smooth it out.


This is a rejig of the Prusa Mk3s extruder to use the old filament sensor with a proxy bearing for indirect sensing. It uses the same bearing and a similar design concept as my earlier mod. https://www.thingiverse.com/thing:3223513. It's easier to print though, as