Filament Motion Sensor Filament Runout Detection

Redesigned the overall structure, making the following improvements

1. Easier connection for pneumatic connectors

2. Minimized overall size

3. Sensor distance adjusted multiple times to fit sensors available on Taobao

4. Adjusted the distance between bearings to prevent slipping and allow easy filament passage

Note:

1. Must be printed with black filament.

2. Do not print with PLA, at least PETG is required, preferably high-strength filaments like ABS. PLA cannot properly grip the filament after one month of use.

3. Since my finished product is already installed and printing, for the photos, the BMG gear shown is a spare, but the one with the bearing and pin should be used.

For Klipper file modifications, please refer to the documentation

BOM:

1 TCRT5000 infrared reflective sensor
1 MR623ZZ bearing
1 BMG extruder accessory kit (idler gear set)
5 M3x20 screws
1 M3x10 screw
6 M3 nuts
2 JP4-01 pneumatic connectors