| 摘要 |
PURPOSE:To prevent wrong movement and enable stable machining, by providing a control mechanism in the driver of a machine tool or the like under numerical control or the like to accurately regulate the driving torque of the driver. CONSTITUTION:When machining torque for a workpiece on a table 1 fluctuates, the rotational angle between the shaft of a motor 3 and a driven shaft 2 changes. The rotation of the shaft of the motor 3 and that of the driven shaft 2 are detected by encoders 6, 7 respectively and counted of deviation by a deviation counter 12. A receiving-side torque signal sent out from the deviation counter 12 is compared with a prescribed torque signal sent out from a presetting unit 14, by a comparator circuit 13. If the receiving-side torque is higher than the prescribed torque, a control circuit 15 acts to decrease the revolution speed of the motor 3 to equalize the receiving-side torque to the prescribed torque. |
