Like Gerry said, they sound like they are synchronous motors, with a capacitor they run at a constant RPM off of line AC. Not the same as a bipolar incremental stepper motor, but I'm not sure....do a search for synchronous motors, maybe you can find out more.
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Halfnutz
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
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