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Best motor for speed control - ( low rpm - spin 1Lb of coffee)

I'm looking for a motor can have its speed varied, down to 1 rpm if needed and that can be done with a simple circuit. I'm building a coffee roasters. I hear that AC induction motors are hard to have their speed changed. The load will be about a pound or so and the motor will spin a cage full of beans over a heat source.  I dissasembled a bread machine and the motor is induction which I have heard is not able to be accurately speed controlled. 

DC or AC? 

I've seen electric drills used to spin the bean cage. What about a treadmill motor? 

 

3 Replies

steveastrouk (author)2012-11-19

For that weight and that speed you only need a very small motor, but lots of gearing down. I don't know where you are in the world - its offered for your profile for reasons just like this, to make recommendations of where to get what you need

Rotisserie motors would probably be ideal.

fizzzbang (author)steveastrouk2012-11-19

I'm here in Colorado.

steveastrouk (author)fizzzbang2012-11-19

Try your local Loewes or Home Depot for something like the rotisserie motor then - good longevity, low price.