| 摘要 |
PURPOSE:To prevent a workpiece from damage due to the inertial running movement of a control shaft, by providing a means which generates a driving instruction driving the control shaft in a direction that the workpiece is separated from a machining tool by a detection output of a power interruption detecting means. CONSTITUTION:The control system of a machine tool is constituted by a machine tool control device 1, servomotor driving circuit 2, servomotor 3 and a speed generator 4. Here the control device 1 generates a driving instruction of the servomotor 3 to be input to the servomotor driving circuit 2 after a deviation from the present speed of the servomotor 3, detected by the speed generator 4, is obtained. While a control shaft connected with a rotary shaft of the servomotor 3 is controlled, when a power supply 5 of the above described control system is interrupted, in a direction that a workpiece is separated from a machining tool by a control system, and this control system is constituted by the following circuits. The is, the latter said control system is constituted by a power interruption detecting circuit 6, driving instruction generating circuit 7, driving direction setting circuit 8 and an electromagnetic contactor delay circuit 9. |
