Brail, motorized curtain

I probably should have posted this with the initial post. This is the actual space I'm dealing with.
 

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With only an 8 foot span, I'd look at a motorized roller rig and lower and raise like a roller shade. 2 inch pvc won't have much deflection over 8 feet.
No more torque than you would need could probably be had from modding one of those hand held electric screwdrivers.
I have some nice stretch cyc material on a 36 foot roller, and it's just rigged with a thin pull line to bring it down and a rope wrap to take it back up.

No mechanical advantage or pulleys, and even that doesn't take much to move the 36 foot version with 14 feet of travel.

We find that when we use what I call "roman shade" drops, your drop lines generally have to be run through loops on the back of the cloth in order to control the fabric fold or accordion as it is taken up. Would look like heck on a translucent drop.
 

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