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?