Higher-ratio evoloid planetary gear 33:1

prusaprinters

<p>Originally remixed from "Hi-ratio evoloid planetary gear" by Parkinbot (thing:4127285)</p><p>We can obtain still higher ratios if we use evenly spaced planet gears with tooth counts which wouldn't normally mesh with a conventional ring gear. We can also squeeze in a few extra for good measure.</p><p>Note that the single toothed sun gear does not offer much in the way of stabilization of the planet gears hence this arrangement requires a carrier (and hence some post-processing).</p><p>Print in place at 0.2mm layer height (for layer jumps and progressive bridging), also optimized for 0.4mm nozzle. Separate carrier using a sharp edge after printing. I used 6 perimeters to add strength to the gears but also to allow bridging of the top carrier brace (see screenshot).</p><p>After printing use a razor blade or sharpened spatula to go around the edges to separate the carrier top and bottom plates. I have also added some holes to grab with needle nosed pliers to help break the seal and get the gears turning.</p>