| 摘要 |
PURPOSE:To prevent the fall of a vertical moving body by equipping a voltage reduction detecting device detecting the reduction of an abnormal voltage and outputting a voltage reduction signal, and a brake stopping the motor which is actuated by the voltage reduction signal and moves the vertical moving body of on the vertical shaft of NC machine tool. CONSTITUTION:In case of the voltage of a power source voltage signal 1 being abnormally reduced, a voltage reduction detecting device 2 outputs a voltage reduction signal 4 to a feed control device 6 and the control device 6 performs emergency stop. A voltage reduction detecting device 3 outputs a voltage reduction signal 12 to a brake driving device 11 as well, the control device 6 becomes in emergency stop state and before the servopower of a servomotor 5 being eliminated a brake 10 is actuated to stop the rotation of the motor 5. Consequently a vertical moving body 7 stops without falling. |
