RepRap Universal Mini Extruder
Release status: experimental
| Description | A small extruder for 1.75mm filament.
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| License | GPL
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| Author | |
| Contributors | |
| Based-on | [[]]
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| Categories | |
| CAD Models | |
| External Link |
Introduction
This printable extruder is intended to work on RepRap Mendel, RepRap Huxley, and virtually any other open-source 3D printer you can find.
It features:
- 1.75 mm filament
- Adaptable mounting plate to attach it to virtually any 3D printer
- Very compact high-torque NEMA 11 motor
- Active ducted cooling for high reliability
- Wade-style hobbed bolt filament transport
- Wing-nut drive to spread the torque loading on the plastic gears
- Push-fit hot-end parts - no thread cutting
- Easily replaced PTFE liner for the hot end
- A single M3-threaded rod cut to lengths makes all the fixings
- Lightweight: 420g (about 60% the weight of this extruder)
- Compact design (110 mm x 90 mm x 80 mm)
Front view
Rear view
OpenSCAD design.
Bill of materials
A useful tool
Most of the nuts in this design are in pairs as double lock-nuts. You will need spanners, of course. But most spanners are thicker than the nuts they fit. You may find it useful to get an old bit of sheet steel and cut your own spanner with a hacksaw. I used a straightened-out shelf bracket.
The hot end
Assembly
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