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A stepper motor moves

  • A.through a fixed angle for each input pulse
  • B.continuously at a speed set by the applied voltage
  • C.at a speed proportional to the frequency of a sinusoidal supply
  • D.only when a position feedback device confirms its position

Answer: A

Correct answer: through a fixed angle for each input pulse

A stepper converts a train of pulses into a corresponding number of discrete angular increments, so counting pulses counts position. This is what allows open-loop positioning: the controller knows where the shaft is because it knows how many steps it has commanded, provided none has been lost.

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