Abstract: A method of stopping an electric motor-driven balancing machine main shaft after an unbalance measuring run in a specific rotary angle stoppage position corresponding to a desired balancing rotary angle position provides that in the course of retardation of the main shaft, a timer is switched on at a short angular spacing of for example 3.degree. before the main shaft reaches the desired rotary angle stoppage position. The timer predetermines a time interval which is determined from the rotary speed and the rotary angle position of the main shaft at the time of the timer being switched on, with the retardation operation being stopped at the end of that time interval, with the main shaft stationary. The retardation operation can be effected by torque reversal of the motor.

Abstract: In a method of rotating a rotary member on a balancing machine into balancing positions in first and second balancing planes, after the unbalance measuring run the rotary member is braked and thus rotated into the balancing position in the first balancing plane, with the braking deceleration being measured. The rotary member is then accelerated to a rotary speed of at most 80 rpm for rotation into the balancing position in the second balancing plane. The rotary member is then braked so that the braking travel resulting from the measured deceleration corresponds to the differential angle still remaining as far as the balancing position in the second balancing plane.