Method for positioning a rotor to be balanced, and device therefor

摘要

The rotor 1 to be balanced can be moved non-positively by a motor (15). Coupled in a rotationally secure fashion to the motor (15) is a pulse generator (20) which supplies one pulse sequence per revolution. Measuring transducers (4, 5) are provided which determine the effect of the unbalance as unbalance measurement signals from which there are obtained rotor-synchronous reference pulses with the aid of which a pulse sequence is defined which represents the rotor circumference. The angular position of the unbalance with respect to the pulse is used for the purpose of determining the number of pulses required until the predetermined position is reached. In order to increase the accuracy during positioning, the pulses representing the circumference are frequency-multiplied with respect to the pulses of the pulse generator (20), and the number of pulses during deceleration is determined with a time delay relative to the start of braking of the rotor (1) and used in order to control the positioning. <IMAGE>