MK8 Bowden Extruder 1,75mm for 2020 Extrusion with Filament Sensor

This is a non geared bowden extruder for use with MK8 drive gear for 1,75mm filaments.

# BOM #
You will also need:
- 2 M3x15 Screws (flat bottom head)
- 1 M3x20 Screws (flat bottom head)
- M3 Washer (depending on print accuracy)
- 3 M4x8 (flat bottom head)
- 2 M2x10 (flat bottom head)
- 1 608 Bearing
- MK8 1,75mm drive gear
- Bowden coupling with M5 screw
- spring assembly (see below)
- a microswitch for filament sensing
- 35 Spring with 6-7mm OD (0.8mm width)
- 1 M4x10
- 1 M4x2