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Apparatus for and method of controlling stepping motor

  • US 5,894,209 A
  • Filed: 04/23/1998
  • Issued: 04/13/1999
  • Est. Priority Date: 04/24/1997
  • Status: Expired due to Term
First Claim
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1. An apparatus for controlling a stepping motor used for moving a movable body from a first position to a second position, the apparatus comprising:

  • a calculating device for calculating a moving distance between the first position and the second position;

    a setting device for setting an acceleration area to accelerate the stepping motor and a deceleration area to decelerate the stepping motor, on the basis of the moving distance; and

    a driving device for driving the stepping motor by a one-two-phase excitation method until rotation velocity of the stepping motor increases to a predetermined velocity in the acceleration area, driving the stepping motor by a two-phase excitation method after rotation velocity of the stepping motor increases to the predetermined velocity in the acceleration area, driving the stepping motor by the two-phase excitation method until rotation velocity of the stepping motor decreases to the predetermined velocity in the deceleration area, and driving the stepping motor by the one-two-phase excitation method after rotation velocity of the stepping motor decreases to the predetermined velocity in the deceleration area.

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