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SERVO MOTOR CONTROLLER

  • US 20080203959A1
  • Filed: 02/21/2008
  • Published: 08/28/2008
  • Est. Priority Date: 02/26/2007
  • Status: Active Grant
First Claim
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1. A servo motor controller to correct a position of a moving object connected with the servo motor through an elastic body based on a torque command value of the servo motor, the servo motor controller comprising:

  • a rotating direction detecting unit to detect a rotating direction of the servo motor;

    a rotating angle computing unit to compute a rotating angle of the servo motor;

    a rotation resistance computing unit to compute rotation resistance on the servo motor side; and

    an elastic deformation error amount computing unit to compute a deformation error amount of the elastic body,wherein the controller corrects a position of the moving object by the steps of;

    detecting the reverse of the servo motor in the rotating direction detecting unit;

    computing rotation resistance in the rotation resistance computing unit based on a rotating angle of the reversed servo motor; and

    computing the elastic deformation error amount in the elastic deformation error amount computing unit based on the computed rotation resistance and the torque command value of the servo motor.

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