Interesting stuff Roger. I was considering doing something similar using Jaycar's 12v 36RPM motor (YG2734) at 2 volts it's doing a bit under 5rpm - feels to have reasonable torque and starts reliably at that voltage.
Would it be possible to reduce the supply voltage to your motor to slow it down a little?
edit> microwave oven carousel motors are good for hi-torque low rpm applications (2.5rpm (iirc)) but of course being 240 volt, they introduce a bunch of other problems.
Michael
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