Simple Filament Presence Sensor
Uses an Optical Sensor to detect when filament is in the path.
Doesn't use a mechanical spring or endstop - infinite life.
Should be compatible with the MMU2 - Filament is fully constrained all the way through, and has a spot for a M10 fitting that will lock a bowden tube in place.
Hemera Compatible - Able to fit inside the envelope of the Hemera when mounted vertically. Bracket included for the OmniPack
BOM (Amazon Links are affiliate links - Will offer a complete kit if desired)
1x Optical Endstop
3x M3x10mm screws
1x 8mm Diameter Steel Ball
2x Magnets, 5mm OD, 2mm Thick
2x PTFE Tubes, 4mm OD (Optional)
1x M10 Fitting, 4mm Tube OD (Optional)
Ideal installation has the M10 Fitting Installed on the input side and the filament sensor is fixed relative to the extruder - See photo of installation on the OmniPack.
The Optical Sensor uses 2 M3 Screws - Ideally 10mm long, threaded into the plastic base, and then clamps onto a mounting brackets using the remaining thread as a mounting stud.