The circuit development of a heavy-duty dynamic balancing machine

The process of dynamic balancing is described in general terms to establish the requirements of the electronic circuitry. The method employed enables direct indication to be given of both the amount and position of existing unbalance. A description is given of a tunable amplifier and its limitations discussed. The operation of the equipment depends, to a large extent, on the performance of a pulse forming circuit. This circuit is required to function at very low frequencies, and a novel method of developing a pulse at the crest of the input cycle, without involving long-time constants, is described