OPERATING METHOD FOR VIBRATING DEVICE

PURPOSE:To carry out the start, deceleration and stop of a vibrating device in a short time, by directly driving the vibrating device by a commercial power source at starting, and driving the vibrating device by a variable frequency obtained by an AC converting device during the steady operation and at deceleration and stopping. CONSTITUTION:In starting a motor 2 as a driving source of a vibrating device, a selector 6 is switched to a solid line as shown, and the motor 2 is directly driven by a commercial power source. At this starting operation, a mechanical resonance point of the vibrating device itself can be passed quickly to thereby greatly suppress the influence to the vibration of the vibrating device. During the steady operation, the selector 6 is switched to an alternate long and two short dashes line as shown, and the frequency of the commercial power source is varied by an AC converting device 4 to make a vibratory frequency adjustable. In stopping the vibrating device, the selector 6 is maintained at the position of the dashed line, and the frequency is adjusted by the AC converting device 4 to generate a braking force, thus similarly passing the resonance point of the vibrating device itself quickly.