Patent ID: 6707267
Filing Date: 2004-03-16
Classification: D03D,G05D

Abstract:
A method of driving a machine having an electrical drive motor for supplying torque of predetermined value and having at least one component, which carries out a periodic motion, comprising the steps of:acquiring first sets of control data for the drive motor, each of said first sets of control data being arranged to drive the motor at each of a plurality of angular speeds at a first defined torque; acquiring second sets of control data for the drive motor, each of said second sets of control data being arranged to drive the motor at each of a plurality of angular speeds at a second defined torque; acquiring at least third and fourth sets of control data for the drive motor, each of said at least third and fourth sets of control data being arranged to drive the motor at each of a plurality of angular speeds at least at respective third and fourth defined torques; measuring an instantaneous angular speed of the drive motor; retrieving one of said sets of control data which is arranged to drive the motor at the measured angular speed with a required torque and applying said retrieved set of control data to the motor.