Eccentric Sphere Gears
by whosawhatsis, published
This is based on emmett's cube gears ( thingiverse.com/thing:6073 ), but with a lot of improvements to the script. Rendering still takes a long time at first (as much as 10 minutes for this version), but I've added caching so that you don't have to wait that long every time. The render statements I used to do this also stop the OpenCSG renderings from looking like something homicidal impressionist clown with dyslexia painted during an earthquake. I also made the animation work, though even with the caching it won't exceed a few fps. The most important thing, though, is that I added a module to the parameters section to define the shape to cut into gears. You can now make gears out of any STL just by dropping the "import_stl" into this module.
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Basically, 8 cone-shaped gears protrude from that 8 sided hub. Then, those gears are cut into a nifty shape. The "off center hub" pretty much means that a sphere shape has been cut from this gear set, but the sphere was offset from the center.
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You can assemble them by threading M3 screws into the plastic of the center block. Use 16-18mm screws for the large gears and 18-20mm screws for the small gears.
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