please tell me the + and - on this hard drive motor
It doesn't have any. Its an AC motor, and relies on you putting three sine waves between the pins.
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+1. it's a three phase AC motor. It can be driven with square waves, but doesn't like it.
A DC motor's speed won't be constant, an AC motor like this, driven by the right signals, stays absolutely rock solid.
+1Unlike, some very old floppy disk drives I have seen.
Yes,but they had feedback from the index hole I suspect.
Your right !!