Patent ID: 6525496
Filing Date: 2003-02-25
Classification: D03D,G05D

Abstract:
A method of driving a machine having an electrical drive motor for supplying required torque of predetermined value and having at least one component, which carries out a periodic motion, comprising the steps of:acquiring a first set of control data for the drive motor, the first set of control data being arranged to drive a motor at a first defined torque for a first measured angular speed; acquiring at least one second set of control data for the drive motor, the second set of control data being arranged to drive the motor at a second defined torque at said first measured angular speed; acquiring at least third and fourth sets of control data for the drive motor, the third and fourth sets of control data being arranged to drive the motor at different defined torques at a second measured angular speed; retrievably storing said control data for said plurality of defined torques at each of said plurality of angular speeds of the drive motor a plurality of defined torques applicable by the drive motor; and measuring an actual value of the angular speed of the drive motor; retrieving the control data for the measured speed, and controlling the drive motor based on the retrieved control data so as to apply the required torque at the measured instantaneous angular speed.