Filament Star prototype 060826

This is a prototype of a multi-filament printing head that fits on an Ender 3. It has full-time access to the filament, no wasted purging, and no color mix because each filament has its own nozzle; it has only one heater. And we also made a ramps board for running the turret and the extruders with an encoder to map the printer extruder movement. The turret is aluminum hollowed to save on weight part cooling fan mounts on the front, blowing down on the bed. More to come later.