Geneva Mechanism

thingiverse

So, I've seen a few of these on Thingiverse but I figured I would post mine too.\r\n\r\nThe Geneva mechanism, also called the Geneva Stop, is 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's also used for indexing (i.e., rotating a shaft through a prescribed angle).\r\n\r\nI use this model in 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 great introduction to mechanical motion.\r\n\r\nAside from printing the spacers and two main components, I used two M5 screws to attach the drive pieces to the mounting plate. Don't tighten these much as you want both pieces to move freely. The third M5 screw is just there so it's easier to rotate with a couple of fingers.