This is an reworked design of our Nema14 geared extruder from Thingiverse (www.thingiverse.com/thing:153356)* All drawings reworked (removed all “reprap” sources so 100% free of other licenses)
* Gear Ratio is now 10:45 instead of 10:43 (gears are not compatible with rev 1.0)
* Idlerscrew nut is now inside the body
* Spring screw`s dosn`t require the nutholder anymore, easier opening
* additional setscrew at the Stepperarm for future dev. (cable/fanholder)
* minor changesAll parts testprinted with a 0,4mm nozzle.
This Extruder uses the same Inserts as the Nano Extruder (except of the
bowden inset which is not available) Groovemount should work without an adapter and the brass insert for 1,75mm
Filament. Altough the Body is capable of using 3mm filament, its only designed to
work with 1,75mm+brass insert ! (for flexible materials)
If you try it anyway with 3mm and it will run don`t hesitate to make a comment to it.
Beware , there are two versions, one with 40mm Mounting holes and one with 50mm !Running on the right setup its possible to print with up to 400mm/s! https://www.youtube.com/watch?v=4339wGiNrxM
Donation: paypal.me/chriyoumagine
Technical
Bolt bearing: 2x128 ZZ 8x12x3,5mm,
Idler bearing: 1x 624ZZ,
Nema 14 Stepper, as strong as possible (teste with 1,8kg Stepper),
2x M3x40 screw,
3xM3x20 screw,
3x M3x8 screw,
6x M3 nut,
1x M3 wormscrew max 4mm
M3 washer
2x M4 Nylock nut,
2x spring for Idler (or cut one into half)
brass d=2,4 D= 3mm, l ~ 20mm for the insert to the bolt, with this its also possible to print flex materials.
If you use a normal 8mm hobbed bolt, you have to add the cone spacers, if you can make your own hobbed bold ensure that the teeth are on the right position.
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ataraxis
almost 9 years
Sers Chri! Hat sich dein Design denn bewährt? Falls nein, wo gibt's Probleme?
Und könntest du die Quelldateien sharen? Ich würde gerne folgende Dinge anpassen:
- NEMA 17
- 5mm Schlossschraube mit Endgewinde für das MK8
- 2.85mm Filament
qboney
over 9 years
Nice Job! I'm working on something similar for Nema14, but moving away from the hobbed bolt.
Keep up the excellent work.
Chri
almost 10 years
<p>Hy Apelpapa, as long as the Wallace has 50mm mounting holes and a topmount fit it should fit.</p><p>The M3 wormdrive will be needed for locking the small gear, it should not be longer than 4mm as there is not much space at the body</p>
Apelpapa
almost 10 years
<p>Will this work with RepRap Wallace? Thank you!</p>
Chri
over 10 years
The lightest useable may be the SM35HT27, its spec is 1.2kg at 110 gram weight, but don`t know hot to get them.
i have a SY35ST28 with 1kg and 130 gram, but never had time to test it with it, maybe i will try it out some time.
Dinopuppy
over 10 years
Thanks for the reply! I'm looking for the lightest nema I can get away with.
Chri
over 10 years
sorry i don`t know the OZ values i only know the kg.
As strong as possible, my Nema`s are wrong labelt (picture), they are SM35HT33 with 1.8 kg/cm holding torque and ~175gram.(rated 180 with cable)
The gear has a ratio of 1:4,5 the effective force is about 8,1 kg/cm with them.
As people also use nema 17 with 4.4kg/cm direct drive you should at least use a nema14 with 1kg/cm but the more the merrier. (1.2 1.4 or 1.8kg)