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Ultimaker Original Extruder

by crattat, published

Ultimaker Original Extruder by crattat Aug 27, 2015
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Summary

This is just a combination from different things to have the entire extruder in one place leaving out optional other parts.

It uses MoonCactus' Rollerstruder (http://www.thingiverse.com/thing:73082). But instead of the original base it uses the remix of the base from elephant (http://www.thingiverse.com/thing:184298). The large gear I used is from foosel (http://www.thingiverse.com/thing:151642) and the small gear again from MoonCactus (http://www.thingiverse.com/thing:45407). As well from MoonCactus is the design of the great hobbed bolt (http://www.thingiverse.com/thing:68480).

In addition following parts are needed:

  • 3 ball bearings of type 608 ZZ (22x8x7 mm)
  • 1 cylinder head bolt M8x40 mm
  • 1 cylinder head bolt M8x30 mm
  • 1 countersunk screw M3x20 mm
  • 2 round head screws M3x16 mm
  • 3 round head screws M3x20 mm
  • 5 M3 nuts
  • 1 hex screw M6x70 mm
  • 1 wing nut M6
  • 2 washers with 6.4 mm innner and 17 mm outer diameter
  • 2 M8 washers
  • 1 pressure spring around 45 mm long, inner diameter at least 7 mm and 1 mm wire
  • 2 pieces of 50 mm 6x4 flexible silicon tube as thermal isolators between motor and frame

Note that you need a Dremel or Proxxon machine to produce the hobbed bolt. This is also described by MoonCactus in very detail.

Thanks a lot to MoonCactus for the fantastic work. The extruder works better than the original one and is much more quiet as well. With this extruder I could lower the current of the stepper driver and it gets much less hot now while it still does the job properly.

I hope it is ok to combine different things this way in a new thing. If not please drop me a short note what I need to do or if I have to remove the thing again.

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I attached 3 screenshots for the settings in CURA for PLA.

I exchanged the original stepper drivers with Pololu A4988 black edition and set the current to 1.2A on the stepper driver. It works properly with this and the extruder stepper doesn't get hot anymore.

Nice, I think I will try to build it.
A few questions. Can you please tell me the print settings you used?
Did you set the current with the m907 command or adjusting the pot on the stepper driver? How much is it now?

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