| 摘要 |
<p>An apparatus for controlling a piezoelectric vibratory parts feeder (10) comprises a piezoelectric vibrating unit (14) provided with a piezoelectric vibrating element (16) that vibrates at a predetermined frequency, a bowl (12) adapted to discharge parts accommodated therein by means of the piezoelectric vibrating unit (14), a driving circuit (20) for driving the piezoelectric vibrating element (16), and a control unit (22) for outputting a driving signal to the driving circuit (20) to cause a predetermined driving. The control is performed by idling the driving of the piezoelectric vibrating element (16) temporarily at every predetermined driving cycles thereof and controlling the vibration of the piezoelectric vibrating element (16) based on a signal obtained therefrom by its piezoelectric effect during the idling period, for instance, based on a phase difference between a waveform of this signal and the driving signal of the driving circuit. <IMAGE></p> |
