Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

One Piece Simple Direct Drive Extruder

by Tobeca, published

One Piece Simple Direct Drive Extruder by Tobeca Jan 18, 2013
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One Piece Simple Direct Drive Extruder by Tobeca is licensed under the GNU - GPL license.

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Very compact, only 50x42x20mm !!
Only one simple piece to print for the whole extruder !!

This is a very simple extruder for NEMA17 motors. Designed for 3mm filament. I think a PTFE pipe to adapt 1.75mm is possible.

You just need a brass insert (Like Adrian Geared Extruder) and a 608ZZ bearing (+ screw and nut).

No springs, you have to adjust the pressure at the mounting of the motor.


Changelog :

18/01/2013 : Tested with filament but not on printing.
18/01/2013 : new version, I've centered the exit hole for the hotend.
21/01/2013 : modification of the space for the brass insert, not wide enough
22/01/2013 : new picture of mounted extruder. Tested for extrusion, it seems to works well !
24/01/2012 : new design to have more access to the filament.

How to use :

I use this type of extruder : http://cgi.ebay.fr/ws/eBayISAPI.dll?ViewItem&item=281052150425#ht_5325wt_1399
It has 30 mm between the 2 M3 screws. So the extruder is design to use the screws of the hotend to get fixed through a carriage.

You need to setup the hotend and the extruder before mounting the motor.

Then, adjust the motor position to grab the filament well (you will have to make some extrusion tests to find the right position).
When it's correct, tighten the 2 M3 motors screws.

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I've the same type of hot hend, do you know the name?? i tryed the QU bd extruder but don't work well...

now i want to try your version, is possible to use MK7-compatible Drive gear (3mm)?

I live in Italy and i can't wait a week for the shipping! :)

Hello, it's a work in progress, and in fact, I won't modify it now. For my printer, I've made a simple and more conventional direct drive extrudeur, you can find here : https://github.com/pyroboynroses/Tobecahttps://github.com/pyroboynros...

For the hotend, I don't know the name too, I bought it on ebay here : http://www.ebay.fr/itm/2x-HotEnd-Fully-Assembled-and-Wired-FREE-Hobbed-Bolt-RepRap-3D-Printer-Hot-End-/281052150425?pt=LH_DefaultDomain_3&var=&hash=item4170037a99#ht_5273wt_1397http://www.ebay.fr/itm/2x-HotE...

Hello everyone !

I've tested it on printing and it's OK, this extruder does its job !!

So, I've uploaded a new file, more accurate and to answer one or 2 problems I've encountered.

So, after some tests, I encounter some problem on the pressure on the filament. I have to mak.

Nice! Where did you source the brass drive gear? Would be awesome if you could share your source here: http://reprap.org/wiki/Drive-gearhttp://reprap.org/wiki/Drive-g...

Hello, I have updated the reprap wiki page to add Voelkner supplier.

I used to order them on RepRapWorld but i've bought the last parts they have. I don't think they will order again.

You can also buy them here : http://www.voelkner.de/products/111343/Kupplungs-Einsatz-5mm-Messing.htmlhttp://www.voelkner.de/product...

Thank you for the link, I'll update the informations.

Cool! Thanks!

No gears, how much torque does the stepper need?

I use a 4.4 Kg/cm stepper motor. But I think less torque would works.

Hi everyone ! I think a NEMA14 version is possible with 624ZZ bearing instead of 608ZZ.
The size will be reduced, about 40x35x15mm.

Hi, I have updated the thing description to add precisions.
Yes, it's 3mm filament.

For now, I've just tested with a filament, without the hotend installed. It works great ! (impossible to stop the filament with fingers when extruding).
The filament is well marked, like on my actual extruder with springs.

Awesome! How well does it work? Is that 3mm filament I see in your pictures?