Skulltruder
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Published on February 11, 2013
Description
Behold and fear my Skulltruder! This is a set of spur gears for the Printrbot or any printer using Wade's accessible extruder. 9/47.
Reworked from Brook Drumm's Printrbot's involute herringbone gears, (which were ultimately derived from works by Wade and Frost) thingiverse.com/thing:16990 and Cleaned Skull by ssd (http://www.thingiverse.com/thing:4126 .
Watch one come to life:
youtube.com/watch?v=VFnkdYUqQWs
Reworked from Brook Drumm's Printrbot's involute herringbone gears, (which were ultimately derived from works by Wade and Frost) thingiverse.com/thing:16990 and Cleaned Skull by ssd (http://www.thingiverse.com/thing:4126 .
Watch one come to life:
youtube.com/watch?v=VFnkdYUqQWs
Instructions
I ditched the small skull on the small gear. It never printed well with the hole through the forehead and the reduction in size. The NEW! small gear has some nice features, including cleaned up teeth, and a strengthened area for the set screw.
Thanks to Emmett, I have a better understanding of involute gear geometry, and I should mention that these two gears are designed to work together. If you use a different drive gear (on the stepper) you may have issues with smooth meshing because of different variables in the tooth profile. They were both ultimately derived from Greg Frost's 9/47t herringbone extruder gear drive.
Large gear is sized for a 5/16 inch hobbed bolt. 8mm maybe not worky.
Thanks to Emmett, I have a better understanding of involute gear geometry, and I should mention that these two gears are designed to work together. If you use a different drive gear (on the stepper) you may have issues with smooth meshing because of different variables in the tooth profile. They were both ultimately derived from Greg Frost's 9/47t herringbone extruder gear drive.
Large gear is sized for a 5/16 inch hobbed bolt. 8mm maybe not worky.
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wizardtakax
on
February 18, 2013
said:
love it, did you try a herring bone gear in addition to spur design?
schlem
on
February 18, 2013
said:
You asked about trying the herringbone vs the spur gear... Not sure what you mean. This is just a rehash of the Printrbot herringbone gear, which is a rehash of Wade's, I believe. I have a laser-sintered version on order with Shapeways, but I wanna try printing it just to see how it comes out.
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Tomvdb - This should work fine on any extruder design based on (or probably similar to) Wade's. You may need to shim the large cog out from the extruder body for best results, or, worst case scenario, make your own 5/16 hobbed bolt. If your extruder uses a different bolt (?) you could rework the hex inset in the middle. Cheers!