DIY Screen Motor Question - AVS Forum
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post #1 of 5 Old 06-01-2001, 09:19 PM - Thread Starter
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I'm not entirely sure where to post this question because it deals with a schematic diagram of a controller for an an AC motor, but since it has to do with a screen I figured I'd post it here. I picked up a surplus heavy duty geared motor the other day which is 115 V and .8 A, and it has three leads coming out of it with a fourth which is a ground. I intend to use it to wind up my screen. It needs a little bit of help to get started spinning which I assume means that it needs a capacitor, but will continue spinning in whatever direction I start it moving i.e. cw or ccw.

What I need in the end is a setup - maybe a three position switch - where by I can raise, lower, and stop the motor. Who can help me here. A premade solution would be best because as you can tell from the fact that I don't even know if this thing needs a capacitor my electronics/
soldering skills are not great, but I certainly would not shy away from making something entirely myself.

Thanks,
Colin
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post #2 of 5 Old 06-01-2001, 10:04 PM
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I know a little about motors being a electrician.

I'm not so sure you need a starting capacitor for the motor. I usually see starting capacitors on higher amperage motors that are in the horse power range. Check to see you are using the correct leads. If you have three leads and the motor runs both directions it usually means that one lead is common and the other two control the direction. If this is the case get a 3-way switch ( these a quite common) at a electrical supply house. Take your 120 vac supply and hook one lead to the common on the motor and one to common on the switch. Take the other two leads on the motor and hook them to the remaining terminals on the switch, it does not matter which ones.

One thing to keep in mind, be careful the way you hook this motor to the screen you want the motor to stop or slip when the screen reaches its limits. Good luck.

Deron

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post #3 of 5 Old 06-01-2001, 10:08 PM
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Also make sure the switch has a center off position.

Deron

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post #4 of 5 Old 06-04-2001, 09:35 PM
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Colin,

Take a look at the installation manual pdf file at the following link for a typical schematic example.
http://www.dalite.com/products/install_pdfs/45.pdf

Ray
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post #5 of 5 Old 06-05-2001, 09:35 PM - Thread Starter
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Thanks guys - between those two pieces of info I should be able to pull it off.
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