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STEPPER MOTOR CONTROL SYSTEM

  • US 3,586,953 A
  • Filed: 09/22/1967
  • Issued: 06/22/1971
  • Est. Priority Date: 09/22/1967
  • Status: Expired due to Term
First Claim
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1. A system for operating a stepper motor to a preselected position in response to an encoded digital signal comprising:

  • a multichannel input circuit for supplying encoded groups of parallel digital control pulses for a motor to be controlled;

    means adapted to be driven by a motor to be controlled for generating after each step an encoded group of parallel digital position-representative pulses;

    a coincidence comparator coupled to said input circuit and to said generating means and effective to develop an output pulse upon each successive comparison of said pulse groups when said Two pulse groups do not correspond;

    circuit means responsive to said output pulse for developing and applying a corresponding pulse to a stepper motor to be controlled; and

    means responsive to correspondence between said two pulse groups for disabling said circuit means to stop the motor.

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