| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple and inexpensive electromotive actuator which can notify its operating state to the outside. SOLUTION: Since pulses are outputted in an open loop to a pulse motor 7, if conformity between the actual position of a mover 14 and the count value of a pulse counter 35 collapses, the position of the mover 14 from the count value of the pulse counter 35 cannot be set as the prsent position. Therefore, if it is discriminated that conformity between the actual position (retreat end position or advance end position) of the mover 14 and the tolerable count value of the pulse counter 35 has collapsed, and a microcomputer 32 outputs resonance command to a driver 31. With this resonance command, the pulse motor 7 rotates finely in normal or in reverse way and causes an electromotive actuator itself to resonate, it to notify the abnormality of itself to the outside by the resonance sound. |
