One-Up / Two-Up Bowden Extruder

NOTE: NOT FULLY TESTED YET - YMMV

A Bowden extruder design for use with the One-Up/Two-Up printer models from QU-BD. Supports the Ubis-style hot-end that ships with those printer kits as well as "Groove-mount" style hot-ends such as E3D and Pico.

Designed to work with my mechanical endstop bracket set (the left edge of the extruder has a bumper for tapping the X endstop).

Has a mounting shelf and ventilation duct for a high-airflow "blower" fan as well as a mounting point for Z-Probe servo.

Requires additional hardware:

• various M3 bolts
• various M2 bolts
• various M3 hex nuts
• various M2 hex nuts

Optional cooling hardware:

• 30mm x 30mm blower fan for Ubis intake cooling
• 40mm x 40mm blower fan for nozzle cooling

40mm fan: http://www.digikey.com/product-search/en?mpart=BFB0412HHA-A&vendor=603
30mm fan: http://www.digikey.com/product-search/en?mpart=BFB0312HA-A&vendor=603

Optional hardware for bed autoleveling (requires additional electronics due to printrboard limitations):

• Standard Micro Servo
• Normally-Open lever switch

Updated: changed Ubis mounting clamp to support an always-on blower fan that keeps the intake of the barrel cool

Also removed the cold-end mount since it didn't fit very well.