On Apr 27, 8:58*pm, Mathew Newton wrote:

a motor
will slowly turn a paddle and provide six servings per revolution.

I'd use a stepper motor. it has the advantage of good torque from a
standstill, not requiring a gearbox, and it's also easy to make it run
for a precise number of angular steps, rather than for a time. To
control it you could use an AVR processor (withh minimal bootloader
you can make a low-cost Arduino), a PIC or even an IQ3 from MUTR
(cheap and very simple, if your needs are equally simple)