| 摘要 |
An electromagnetically driven transport device 1 includes a transport unit 4 for transporting an article M to be transported, an electromagnetically driven vibrating unit 2 for vibrating the transport unit 1 to transport the article, a frequency controlling unit 14, a time detecting unit 15 and a frequency setting unit 16. The frequency controlling unit 14 controls a driving frequency of a driving power source 13 of the vibrating unit 2. The time detecting unit 15 detects a time length T during which when the driving frequency is changed the driving current of the vibrating unit at each of frequency exceeds a reference current value. The frequency setting unit 16 is operable to set an actual driving frequency based on the time length T detected by the time detecting unit 15.
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