Automating a window shade for a projector screen.

[dave w]

I have a spring retractor, so, I'll to fabricate the motor to screen connection.

I would be tempted to not use the spring retractor and twist the retractor mechanism with the rod.  Trying to disable the clutch to allow it to retract could be tricky.

I use two appliance modules for each drape motor("Graber brand).

Why not have a universal module (or appliance module) control a DPDT relay that turns the motor on in the correct direction and have the limit switches turn the motor off.

Roger - yeah, Universal module and DPDT relay will do the job also. I just used two Appliance modules only because the "Grabber" drape motor forward and reverse windings are 120V and I utilized the Grabber limit switches.  So appliance modules worked well with little other "plumbing".