Stepper Motor wiring

How to figure out the internal wiring of a stepper motor using an Oscilloscope

Also see: other methods if figuring out stepper motor wiring

Rodney McLatchy says: "...attach A+ and A- to 2 probes of the scope common to ground, and spin the shaft by hand. On the screen they should come out 180degee. out of phase. If one phase is backwards they would look the same. Or if I mixed an A with a B, 90degees out."

Motor wiring diagrams (for reference)

See also:

• Javascript page to find the center and phases for 5 and 6 wire unipolar stepper motors from your resistance measurements between the wires.
• Stepper Motor Connection Options All the different ways you can hook your motor up, once you know which wire is what. Compares Unipolar, Bipolar Serial, Bipolar Parallel, Bipolar Single

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