About this 3D model

This (**untested**) design has 3 printable parts. These can be used to convert a stock qu-bd extruder to use a bowden tube. Note that this is an experiment. I currently do not have any mount for the drive portion, once I get it working I'll work that out. My goal is to get 2 print heads as close as possible mounted on the ord-bot. I believe I can get them closer by removing the drive motors (thus bowden) At the moment i do not believe I can use the body block from the MBE. Those 6mm tapped holes are probably too close together. This first draft is intended to help me debug the whole bowden concept **non-printed parts:** * qu-bd MBE extruder kit * Straight Quick Connectors Pneumatic Fittings 4mm x 1/8" PT Male Thread (10 for 7.26 on ebay @ http://www.ebay.com/itm/321061698459 * 1M PTFE/Teflon Tubing/Pipe OD 4mm ID 2mm Tubing - (1m/$5 on ebay, search "ptfe 2mm 4mm") * 1x 624 bearing (ebay 10/$5) * 3x M3 screws to mount the drive parts to the stepper motor * M4 screw for bearing. (I printed the lever/bearing hole a little small so I could use a #4 screw) * Spring (I had one in a box, it was the diameter of a pencil, and around 1 inch long. I think I got it in a kit from Home Depot) **update 10/9/14** I have been printing with this setup for over a month. I am using the water cooled hot end from [thing:280314](http://www.thingiverse.com/thing:280314) instead of this air cooled one, but I would expect similar results. I consider the bowden setup a success (had to increase the retract compared to a virgin MBE to eliminate stringing.) At this point I'm more interested in perfecting the water cooled extruder so I'll post further updates there.