I'm still looking over parts and possible designs for this. A problem I'm running into is I need a 10" or 12" stroke for an actuator, and that's going to be tough to set up, since that means more than double that in room for an actuator, and the box isn't that big.
I'm wondering if I should do this in 2 stages. For instance, two actuators are used to lower a square frame about 5-6". Then two more actuators on this square frame lower the main box with the projector another 5-6" to put it in the preferred position for use. My concern is that I feel that the chance of failure is at least the number of moving parts squared - 2 parts would be 4 chances, 4 parts would be 16 chances. True, that's not any official rule, just experience. Doing a 2 stage movement would mean double the parts - but it would also mean I could keep the size of the box from becoming too large.
When I keep studying this, that seems about the only workable solution, but it seems kind of Rube Goldberg-ish to me.
Any thoughts on that?