Process and drive for torque-controlled driving of a machine

Procedure for the operation of a machine which contains at least one construction piece that carries out a periodic movement, by control of an electric drive motor (2), characterized in that control data for the drive motor is determined and stored (2) which, for each of a large number of drive motor revolutions (2), correspond to a large number of predetermined, different turning moments, supplied by the drive motor, measurement of the actual speed of the drive motor (2) and call of the stored control data, which for the actual number of revolutions measured correspond to a predetermined turning moment to be supplied.