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Acceleration/deceleration control circuit for a stepping motor

  • US 4,119,902 A
  • Filed: 07/08/1977
  • Issued: 10/10/1978
  • Est. Priority Date: 07/08/1977
  • Status: Expired due to Term
First Claim
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1. An improved acceleration control for a stepping motor which includes a source of pulses of constant frequency, a plural stage up/down counter with one input for stepping said counter is one direction connected to said source of pulses, decoding means connected to plural stage outputs of said counter for providing a voltage corresponding to a count stored in said counter, a variable frequency oscillator responsive to said voltage for providing pulses at a rate related to said voltage, said variable frequency oscillator having an output supplying pulses to said stepping motor, said output also connected to a further input of said plural stage up/down counter for stepping said counter in another direction wherein the improvement comprises integrating means connected between said decoder means and said variable frequency oscillator.

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