I am trying to think through an idea I have but I am not sure what all options I might have available. Looking for any input, ideas, links etc to help me on my way.

Can the signal from a optical encoder be used to send a stepper motor to a preset location? I realize encoders are used to report position. What I am in need of accomplishing is a way to read the position of a manually adjusted optical focus wheel some 4-5" in diameter and have that position then be sent back to the stepper to index a spindle. I do not need fast motion but I need minature/micro size.

Maybe I need to be looking at optical positioning and some way to set marks an optical eye could read and then send the appropriate pulse to the stepper for indexing.

Any ideas much appreciated. I have not worked with encoders before and not sure what all they are capable of these days.

TIA


Bo