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Wiley's Extruder

by WBJ, published

Wiley's Extruder by WBJ Dec 29, 2012
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5262Views 1155Downloads Found in 3D Printer Extruders

Summary

An experimental two-high spring dampened reversing roller cold end for a Bowden cable system. Uses modified Tetrix spur gears and axle hardware. Filament enters and exits on a 30 degree angle to assist in better hose curvature. Uses spring dampening system to allow deviations in the 3mm plastic filament diameter with an adjustable bottom out feature for decreased potential slippage. No bearings or moving plastic componentry.

Instructions

UPDATE: First prototype made; needed extensive modification/machining for assembly+operation. Need to modify design to remove extra machining steps.

Still in preliminary testing. For all I know this design might not work. Will update page once prototype is manufactured and tested.

BOM
1x extrudermotorside.stl (file is created with inch measurements)
1x extruderbushingside.stl (file is created with inch measurements)
1x NEMA 17
4x M3x10 SHCS bolt
8x 6-32-0.5" SHCS bolt
5x 1-4 UNF-1.5" SHCS bolt
5x 1-4 UNF Hex nut
2x compression springs (specs TBA)
2x 1/8 NPT pipe tap push-fit connector
1x Tetrix flat shaft axle

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It definitely looks nice. How's it working?

Thanks! It's looking promising, yet has an issue with retraction/extrusion rates. I need to spend some more time working the kinks out; I just haven't found the time yet. I will post pictures to my flickr when I do. http://www.flickr.com/photos/wileyb-jhttp://www.flickr.com/photos/w...

Awesome work - would you by any chance have the Tetrix part numbers? I'm lost searching for parts, 'specially the axles...

Thanks a lot John. I added tech specs to the BOM off the Tetrix website.

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