NEW Revised Version 2.2 of the Universal Paste Extruder

Update Nov. 23: Uploaded a new stl which is scaled correctly. Old file was 10x to large. Doing a test print now.

An updated and cleaned up version of the 10 CC V2.1 Paste Extruder based on the original Universal Paste Extruder from RichRap. This is a work in progress and I have not yet tested it. If you do build it, please give me feedback!

For the time being, find all the small parts (gears and such) needed to build an extruder here: http://www.thingiverse.com/thing:591849
Just use them with the new V2.2 extruder body.

Summary

This is a upgraded variant of RichRap's universal syringe style paste extruder. It substitutes a few easier to find bits of hardware to replace the longer M4 stuff I had a hard time finding. I also spent some time cleaning up odds and ends fitment wise to get it to work well and take less time to print.

It is based around a 10 ml/cc syringe. The best type is the Leur Lock ones with interchangable tips, but I've had good result with the measuring type syringe with the simple spout without needles.

I've also made an adaptor to allow mounting on several Prusa style X carriages: http://www.thingiverse.com/thing:590801

BOM for Paste Extruder 10 cc V2.2

_1 x Print - Plastic Body V2.1 Extruder
_1 x Print - Gear and drive set (small gear, medium gear, large gear, idler block, syringe pressure block
_1 x NEMA17 motor, 5 mm shaft? _1 x Drive gear T5 10teeth Metal drive Gear (you could print one of these)
_4 x 624 bearings? _1 x 608 bearing? _1 x 20mm 8 mm smooth rod or M8 rod? _2 x M3 set screw for stepper drive gear & belt pulley
_4 x M3 nuts, tension, drive gear & pulley
_2 x M3 x 45mm bolts for idler tension? _4 x M3 x 10mm bolts for stepper motor mounting
_7 x M3 washers?_3 x M3 Nuts?_3 x M4 x 30mm for idler hinge pin
_1 x M4 x 55mm hex head bolt for the large gear shaft
_1 x M4 x 45mm cap screw for the double/medium gear shaft? _1 x M4 plain nut for syringe clamp? _3 x M4 Nylock type nuts
_4 x M4 washers, between gears and 624 in cap
_2 x springs or Silicon pressure spacers for Idler
_1 x small zip tie
_1 x 5-6mm wide T5 belt(or to match pulley) ~about 40cm
_1 x Plastic sheet to print paste onto

Standard 10ml Syringe - Luer Lock or centre slip types. Various syringe needles 1.8mm - 0.1mm - For Luer Lock syringe. Syringes with offset nozzles can also work, but make sure to clamp in place so they don't rotate in the paste extruder body while in use.