Optical Runout Sensor for Micro Swiss Direct Drive (Ender 3/Pro)

thingiverse

I was looking around for a runout sensor since I upgraded my Ender 3 Pro with a Micro Swiss Direct Drive and found the design by Sulfu, which is quite smart. It utilizes an optical sensor and is compatible with transparent filament by implementing the reliable and simple shutter mechanism, which is magnetically levitated. Further it is rather small and lightweight. A fantastic design! I remixed it and added a flexible square mount that snaps around the extruder stepper. Further, I adjusted a few tolerances and made some esthetical adjustments, so that it fits better my overall design.The small ball bearing is held in place by a 3mm printed shaft. I put my personal logo on the front, but the stl I provide has **no logo** in case you want it without or design something yourself. **Components:** 1 x [optical sensor](https://amzn.to/2Om093U) 4 x [magnets 3mm](https://amzn.to/30wikGB) (diameter) x2mm 1 x [ball bearing MR63](https://amzn.to/3t50Zkn) 2 x screws M3 x 8mm ca. 6cm PTFE tube 4mm in diameter