Direct drive extruder for hypercube printers

Inspired by Hypercube Evolution extruder, combined with the power of direct drive extruder and, BL touch and a filament sensor extruder.

To be able to print flxible filaments I needed direct drive extruder, plus i wanted to change my nozzles often. On standard prusha i3 MK3S extruder the process of changing nozzle is a real proccess. I wanted an extruder that makes it as easy as possible.

## Features
- Easily maintainable
- Direct drive
- Supports BL touch
- Filament sensor
- Supports E3D Volcano type hotend
- Extruder is exchangable, locking mechanism is compatible with Hypercube Evolution X-Carrige
- Supports Hypercube Evolution Optical sensor homing, but I used it with sensorless homing

## Parts

### Electronics and movement

- **Optical Sensor**: https://www.banggood.com/TWO-TREES-10pcs-Optical-Endstop-Light-Control-Limit-Optical-Switch-for-3D-Printer-p-1510313.html
- **Prusha extruder gears**: https://www.banggood.com/1Set-Prusa-i3-MK2-or-MK3-Cloned-Btech-Du