| 主权项 |
1. A chip evacuation device that evacuates chips produced in a machine tool to outside of the machine tool, the chip evacuation device comprising:
a synchronous motor as a power source for the chip evacuation device, a load monitoring unit that monitors a load on a synchronous motor or on a driving unit of the chip evacuation device which is operated by the synchronous motor, a threshold storage unit that stores at least one threshold of the load on the synchronous motor or on the driving unit of the chip evacuation device which is operated by the synchronous motor, a comparison unit that makes comparison between the load monitored by the load monitoring unit and the threshold stored in the threshold storage unit, and a synchronous motor control unit that changes a number of rotation or a direction of rotation of the synchronous motor in accordance with results of the comparison made by the comparison unit. |
