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Stepper Motor wiring

These days, most of the time, it's Red, Blue, Green, Black, in that order. Red and Blue are the first coil, Green and Black are the second, and if you wire them to the driver in that order, it will "just work".

Note, however, that if you are using the Pololu standard connections, they have the phases ordered: 1B, 1A, 2A, 2B. So for that connection, you want the wires to be Blue, Red, Green, Black.

Methods used to determine internal wiring

Also: 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

NEW! Roman Black's Linistepper controller kit

Motor wiring diagrams (for reference)

Phil Ritchey says:

[When I] hooked up the motor in SERIAL Bi-POLAR configuration I discovered: Once wired into two each 2 coils sets, shorting the ends of either of those sets together LOCKS the motor. But if you get the ends of a coil identified wrong (Backwards), the coil will NOT LOCK. A further test that you got it correct.

Questions:

Michael Teslastein Says:

@jamesgyore Just connect the same color leads of identical stepper motors with each other and the one that you turn by hand will drive the other. It works quite well.
+

Mariss Freemanis of Geckodrive.com says:

"Most will agree 22-gage wire is pretty small (0.64mm or 0.025" diameter). Let's see how it would work out wiring to a 7A per phase motor 10' (3m) away.

22-gage wire has 0.16 Ohms resistance for a 10' length. Two wires are needed per coil so that's 0.32 Ohms. The voltage drop will be 2.2V due to wire resistance at 7A. If your power supply voltage was 65VDC then it just became a 63VDC supply as far as the motor is concerned. Will your motor know the difference? Not at all; it draws 7A at low speed where supply voltage doesn't matter.

At high speed your motor phase current drops to 3A. The cable drop becomes 1V, the supply becomes 64VDC instead of 65VDC. Does the motor care? Not at all again.

Will the cable melt? Cable dissipation is 72 times 0.32 or 15 Watts. That works out to about 1/8W per inch. It will be warm but not hot. At high speed it's 3W and 0.024W / inch. Not even warm."

See also:

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