Wade's Geared Extruder
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Release status: unknown
| Description | Geared Nema 17 Extruder
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| License | GPL
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| Author | |
| Contributors | |
| Based-on | |
| Categories | Extruder
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| CAD Models | |
| External Link |
This is a work in progress, and any feedback is very welcome.
My Repraps, both Darwins and Mendels are all currently limited by the speed and reliabilty of my extruder. I use a Mk II Extruder for most of my printing, as it has proven to be the most reliable, but it won't extrude much above 3 mm^3/s of ABS or PLA. My goal is to try and build a reliable, printed extruder that can extrude at least 6 mm^3/s, and with luck, more.
I have built several direct drive pinch wheel extruders, but none have yet had enough torque to extrude at 3 mm^3/s, so I decided to backtrack a bit and try for a more robust extruder design.
Here is the latest version of this extruder:
This extruder is a variation on Adrian's geared Nema 14 extruder. The gear ratio is currently 44:14, which isn't a huge reduction, but it does help quite a bit. It also allows me to use a very small pinch wheel, a 7 mm OD, 11 tooth gear, mounted on an M4 bolt. This has the advantage of a very small radius, reducing the torque required, but introduces significant variability in the feed rate, due to the small number of teeth.
