Geneva Mechanism
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So, I've seen a couple of these on Thingiverse but I figured I would post mine as well. "Geneva mechanism, also called Geneva Stop, one of the most commonly used devices for producing intermittent rotary motion, characterized by alternate periods of motion and rest with no reversal in direction. It is also used for indexing (i.e., rotating a shaft through a prescribed angle)" https://www.britannica.com/technology/Geneva-mechanism I use this model in one of my CAM classes where we use MasterCAM to generate machining code for the three main parts. It is a simple mechanism with many practical purposes and is a good introduction to mechanical motion. Aside from printing the spacers and two main components, I used two M5 Screws to attach the Drive pieces to the mounting plate. Do not tighten these much as you want both pieces to more freely. The Third M5 screw is just there so that it is easier to rotate with a couple of fingers.
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