The Duet uses internal stepper drivers. In the event that you desire external drivers, consult the wiki.
Is your stepper motor spinning in the wrong direction? We will cover reversing the direction in firmware later on in the configuration guide.
If you have two Z-Axis stepper motors, connect them to ZA and ZB.
If you only have one Z-Axis stepper motor, plug it into the ZA connector and be sure that the supplied jumpers are installed on the ZB connector.
ZA and ZB are wired in series; without a second stepper motor or the jumpers in place on ZB, ZA will not function.
If you use more than five stepper motors, you may use a Duex2 or Duex5 expansion board which offers 2 or 5 extra stepper motor outputs, respectively.
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