| Ah, so both of us were in the dark about the others' expertise - I hadn't really thought about the fact that FPS is basically a start-stop frequency in analog film. > Film seems soft and easy to damage, but somehow all that seems to work anyway. I still think it likely that force transfer relies more on the filmstrip, but I'm also assuming that the filmstrip stays under tension (the shock absorber in the Wiki link appears to be that slash a belt tensioner for the filmstrip). (Also, I wasn't aware that Geneva drives had actual real-world use cases. Thanks for the Wiki link!) > He 3D-printed the pinion gear out of plastic, which achieves that. Yeah- this part actually surprised me a bit. Plastic gears are great for low-torque applications, but my understanding is that with high-torque/high-force applications, you start running into shear stress material limitations. This is one of those "just try it out and see how it holds up" questions. I'll also say that when I read your suggestion, I was really confused because the first sprocket that came to mind was a bike sprocket... :) (FWIW, I'm not a MechE, just a software person who spent enough of their high school years in a shop.) |