the slave drive is known at the start of synchronization or if the slave drive is controlled so that the zero position can be determined before the synchronization it is thus possible to determine the synchronization function before the starting time of the synchronization with which rotational speed and angular synchronism are simultaneously achievable fig3 b shows a speed plot diagram wherein rotational speed and angular setting or position are synchronized simultaneously at constant rotational speed of the master drive for this purpose before the start of the synchronization by using the operating values from the master drive a lead or advance running time t is calculated by which the starting time t s0 of the synchronization must be changed in order to be able to synchronize both rotational speed and angular setting or position of the drives at a prescribed synchronization time s the synchronization accordingly begins at the time t s t s0 t fig3 c is a graphic representation of a speed plot diagram of the slave drive for a changed master rotational speed and adapted or matched slave synchronization wherein the change ends before the synchronization time s fig3 d is a graphic representation of a speed plot diagram of the slave drive for a changed master rotational speed and adapted or matched slave synchronization wherein the change ends after the synchronization time s in both alternatives according to fig3 c and 3d initially the change in the operating values of the master drive is determined in a change function and prescribed to the control of the slave drives respectively the change function is applied to the.