Parametric Herringbone Gear Set for Greg's Accessible Wades
by triffid_hunter, published
*** UPDATED 25/12/2011 ***
uploaded my latest script which I've worked on a lot. It's generating some nice gears now.
Also updated the STL, ratio is 45:11, nut trap should fit perfectly straight off the bed now.
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Resliced in Kisslicer and the print is super clean. Slides easily onto 5mm shaft of the stepper motor. No bumps this time around. Very nice. Great modeling, triffid_hunter!
Printed this out last night. Great dimensioning, m3 nut and m3 bolt fit in the smaller gear nicely! 5mm stepper motor shaft fit nice and snug in the smaller gear as well!
Printed mine at 100% infill and experienced overheating of the extruder stepper motor consistently for the first time. Had to add cooling fan on extruder motor to ensure a successful print(heat transferred from motor through shaft to the filament driving nut, softening it and causing jams(printer issue, not model issue).
Awesome gear design, Triffid!
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This is a detailed part (due to the tooth profiles) so use your smallest nozzle.
Print in PLA, it will last a lot longer due to being harder than ABS.
Set 0 extra shells (skeinforge)/ 1 perimeter (slic3r) because you can get hollow teeth with extra shells/perimeters.
Use 80-90% infill. I've already removed lots of plastic, what's left is what's needed. If your infill is too low, the most likely failure is the nut trap in the small gear will break.
You'll need really good cooling to do the base of the small gear properly. When the large gear is finished, crank your fan up to max, perhaps convince your slicer to slow it down a little too.
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