Roller-gided filament sensor for Ender 3

thingiverse

I loved robathome's idea so much that I decided to incorporate a fillament sensor into my design. By reusing the ring and spacers, you can simply print the new frame if you already have robathome's setup. In addition to the fillament sensor, I also created a second roller guide for the top-left corner of the Ender 3 frame. For the fillament sensor, you'll need to print four parts: the frame (FillamentSensorVx), one ring (print ring.stl first, and if it's not tight enough, try ring-sm.stl which is slightly smaller inside), two spacers, and an optional cover. To assemble the roller guide, you'll need to print three parts: the frame (Roller_Guide), one ring (print ring.stl first, and if it's not tight enough, try ring-sm.stl which is slightly smaller inside), and two spacers. You'll also need a few extra components, including a RunOut Sensor with a wheel (available on AliExpress), 608 bearings (commonly used in skateboard wheels and other applications), M4 x 16mm bolts, and M4 nuts (spare parts from the Ender 3). The fillament sensor model features a long trench instead of bolt holes, allowing you to adjust the endstop height. This ensures that the sensor remains open when there is no filament.