Need assistance with the electric motor aspect for a retractable projection screen.
I want to build my own motorized movie screen and have just about everything thought out except for how to set up the drive system. Mainly, I'm trying to figure out how to set up the electric motor system so that when you stop lowering the screen it stops at that point instead of drifting a little bit as electric motors tend to do. Also, a good suggestion for the size of a motor would be helpful. I don't know what the final weight of the screen will be, but it'll have some heft to it. Appreciate any information on the subject or resources. Thanks!