Adrian's Geared Extruder

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Revision as of 13:19, 21 March 2010 by Adrianbowyer (talk | contribs) (What you need)
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This page is a development stub. Please enhance this page by adding information, cad files, nice big images, and well structured data!

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Adrian's Geared Extruder

Release status: Experimental

Finished-rear.jpg
Description
Geared Nema17 Extruder Driver
License
GPL
Author
Contributors
Based-on
Categories
CAD Models
External Link


Introduction

Finished-front.jpg

I wanted to design a universal extruder driver that could

  1. Be bolted to the X carriage of Mendel and run as a normal extruder,
  2. Be mounted somewhere at the side and drive a Bowden extruder, and
  3. Be mounted somewhere at the side and drive a Bowden paste extruder, as outlined here.

This is my first hack at a solution.

This design was made to extend Wade's neat geared extruder that you can find here. (Wade's design was based on my original here.)

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Features

  1. 55:11 gear ratio means that the motor runs on very low current
  2. No hobbing or knurling to make the filament driver
  3. Torque transmitted using a wing nut, giving low stress on reprapped gears
  4. Uses the same 624 bearing as the rest of RepRap Mendel.

What you need

This describes what you need to build an extruder to mount on Mendel. Other variations will be added below when they have been tested.

The design files (AoI, STLs, and the complete RFO for immediate reprapping) are in the repository here.

Bom.jpg

This picture shows all the parts (some partly assembled) except for the two M4x20 screws that attach the extruder to Mendel's X carriage.

M3x10 4
M4x12 2
M4x20 2
M4x45 6
M4x55 2
M4 nuts 13
M4 wing nut 1
M4 washers 21
624 bearings 3
NEMA17 stepper 1
M4 threaded rod 70mm
M4 rod 25mm
M4 insert 1
Strip-board 50mmx25mm
4-way pin headers 2
4-way ribbon cable
16mm dia PTFE 50mm
M6 threaded brass 36mm
Thermistor 1
Kapton tape 200mm
Nichrome wire 6 ohms
Araldite rapid About 5 ml

Here is a complete list of all the non-reprapped parts and materials.