26 Reply by pastprimitive

  • pastprimitive
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  • Registered: 2013-02-23
  • Posts: 206

Re: The benefits of upgrading to a geared extruder?

Actually turned out just fine.  Chatted with customer support, changing the order right now to a 6mm shaft--no 5mm shaft--but I have a 4 jaw chuck and the patience to get my runout within 0.03mm to bore it out to 6mm. So no biggie.

Again, thanks for catching that. 

Here is the one I changed to. http://www.omc-stepperonline.com/ratio- … p-140.html This is only 34mm long motor. So i'll get another 6mm of clearance to play with. Plus the weight ought to be better then even the solidoodle stock motor I am assuming.  The whole package weighs in at 380grams not including the extruder.  And it's $5 cheaper. 

Now I should go track down a 6mm ID hobbled extruder gear for those who want to do the upgrade and don't have access to a lathe.

Thanks for saving my skin again. An 8mm shaft would have been a MAJOR pain to deal with.

27 Reply by spapadim

  • spapadim
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  • From: Jersey City, NJ, USA
  • Registered: 2013-05-16
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Re: The benefits of upgrading to a geared extruder?

FWIW, just out of curiosity I had to search "nema planetary" on Thingiverse and, not surprisingly, there are lots, e.g. http://www.thingiverse.com/thing:8460 (with added ~35mm depth this doesn't look it would work, but still interesting smile

28 Reply by pastprimitive

  • pastprimitive
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  • Registered: 2013-02-23
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Re: The benefits of upgrading to a geared extruder?

Yeah I saw some of those as well.  My only concern was that the printed gears would not be precise enough to give equal extrusions per step since the tooth profile would vary slightly tooth to tooth. At least relatively speaking when compared to the machined/cast metal gears used in the gear boxes I looked at.  That's why I decided to bite the bullet and just play safe.  But I am sure you could come up with an all printed solution, just may not be as effective.