Here is the basic idea, please excuse my lack of drawing skill.
Thanks Bob, I have read your 'work' a few times and will continue to do so as I digest and understand the content. I get the principle but need to ask certain questions like : when you activate a coil with a N pole and then activate it with a S pole, is this done by reversing the coil supply wires ? Also, would I be wasting my time trying to run it on 12v. Apologies for the basic questions but if I'm anything I am an engineer and not well versed in electronics.
View attachment 46220
You place neodymium magnet discs around the rim of the turntable, with alternating poles out, N S N S...
You arrange two electromagnets, spaced apart half the spacing of the magnets,.
To move clockwise:
1. Activate coil A with a N pole. This will pull a S pole magnet it front of it, as shown in the diagram.
2. Deactivate A and Activate B with an S pole. This will pull the N that is too the left of coil be, to it, rotating the the turntable 1/2 a stepl
3. Now you activate A with an S pole. That will pull the N from coil B to A rotating it another half step.
4. Now activate B with an N, and it pulls the next S to be in front of B.
5. And finally, activate A with an N, which puts you back at step 1 and you repeat the sequence.
I will leave it as an exercise to the reader to figure out the sequence to rotate the other direction.
This is exactly how a stepper motor works.
The beauty of a stepper is that you do not need any feedback on position or distance moved because it moves in repeatable discrete steps.