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Small, slow moving motor


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#1 Sergei

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Posted 05 June 2007 - 04:55 PM

I'm making a Rift and I'm looking for a motor the will turn slowly and be easy to hide. I've never done anything like this and I was wondering if anyone had any suggestions.

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#2 Madog Barfog

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Posted 05 June 2007 - 05:44 PM

There are 2 ways to make a motor turn slowly: use a stepper motor or gear it down with a gear box.

I don't know how small stepper motors get, but they are usually bulky and require support circuitry.

You may be able to find a small servo in an R/C hobby shop that has an integrated gearbox. They can be small. You'll probably have to modify it if you want a full 360 degress of rotation.
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#3 Qwyksilver

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Posted 05 June 2007 - 05:58 PM

I'd imagine a good Model Railroad shop would have something you could use as well. Maybe buy a small battery or electric powered carousel and gut it for the motor. There's probably all kinds of those Xmas/Halloween village things you could cannibalize.

I am presuming this is for a terrain piece, and not some sort of set dressing.

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#4 Sergei

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Posted 05 June 2007 - 07:01 PM

Correct, This is for my scenario for ORIGINS. I know a couple of shops I can check.

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#5 Doombringer

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Posted 06 June 2007 - 11:39 AM

how about a slot car motor?
you can make it go as fast ro slow as you like by just varying the voltage and it's very small to boot.
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#6 kristof65

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Posted 06 June 2007 - 02:06 PM

I don't know if this is small enough for you, but MicroMark has an Animation Gear Motor

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#7 Madog Barfog

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Posted 06 June 2007 - 03:18 PM

how about a slot car motor?
you can make it go as fast ro slow as you like by just varying the voltage and it's very small to boot.


There is a limit to how slow you can make a motor go by dropping its voltage. You can go from, say, 8000 RPM at full voltage to maybe 2-3000 RPM, but if you want only a few dozen RPM, you are more likely to burn up the windings this way, and torque will fall off dramatically until it just stops turning.
Those who don't understand THAC0 (subtracting a small number from another small number) should probably not admit to it in public.




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