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Extruder direct drive Nema 17 1.75 with Jhead adaptation (for prusa?)

by ghunt, published

Extruder direct drive Nema 17 1.75 with Jhead adaptation (for prusa?) by ghunt Jan 15, 2013

Description

Direct drive 1.75mm filament extruder which work fine for prusa. It use the standard 50mm M4 holes, and Jhead adaptation. And is specially designed for 1.75 jhead Nozzles.

[NOTE] V0.6 is the last version

Caution! This is a prototype, it's not sure it work fine, I still need to test it for some time before saying it's perfectly working ;)

Recent Comments

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Are you gonna release the source?? I had some ideas for some improvements.
Thanks.
Alex.
I did it, I just didnt post it ;) Will send it later. Thanks for the comment ;)
You should modify this to work with the much more common 608 bearings. I'll probably do so myself later today. I'll post it if it works well.

Also whenever you finalize this design, it would be smart to release an alternate version with mounting holes for geared stepper motors (The rim is the same size, but the holes are 28 mm apart not 30) since they are much more common in direct drive extruders.

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Instructions

You will need :

  • 1x 5mm insert (please check the pictures!!=)
  • 1x 626ZZ bearing
  • 1x M4 bolt
  • 1x spring for the M4 bolt
  • 1x NEMA17
  • 1x 6mm bolt to cut
  • (optionnal) 1x M4 wingnut is the best

Support material needed..

You will need support to print this extruder.

Work with the prusa V2, and should work with basically all printer with 2 holes with 50mm in between, like the first printerbot, etc..

Put all bolt in the NEMA17!! it have been designed to use it all, do not avoid any hole.

Any suggestions is good to take !

Enjoy ;)

PS: We could use other bearing but laziness stopped me before creating adaptations ;)

Caution! This is a prototype, it's not sure it work fine, I still need to test it for some time before saying it's perfectly working ;)

Note: My config: -NEMA17 44Kg/cm (could be much less), -for my 5mm insert the STEP_MM is 70 with 1/8 uStepping Speed:3000mm/min (could be more, but work fine) Acc:4000mm/s-2

Changelog: *v0.6: -Larger foot, reducing oscillations -2 parametric fixations added (usefull on prusa) -shape changed -unnecessary hole removed

Are you gonna release the source?? I had some ideas for some improvements.
Thanks.
Alex.
You should modify this to work with the much more common 608 bearings. I'll probably do so myself later today. I'll post it if it works well.

Also whenever you finalize this design, it would be smart to release an alternate version with mounting holes for geared stepper motors (The rim is the same size, but the holes are 28 mm apart not 30) since they are much more common in direct drive extruders.
I did it, I just didnt post it ;) Will send it later. Thanks for the comment ;)
hows it working. Anyway you could post the source files like.scad so I can adjust it to 3mm and try it out?
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