The numerically controlled machine tool device null which has the associated control power failure

摘要

PURPOSE: To suppress the capacity of a uninterruptive power unit small and prevent respective parts of the machine tool from being damaged. ;CONSTITUTION: The uninterruptive power unit 4 always supplies the electric power to a computer device 7 and the control circuit for actuator driving devices 10 and 12. A feed device and actuators 11 and 13 for tools can avow a momentary power failure, etc., so they are excluded from the load on the uninterruptive power unit 4, whose capacity is reduced. When the abnormality time of the power source is at a level 1 below a 1st set value, the actuators 11 and 13 are placed in a stand-by state and when the abnormality time exceeds the 1st set value and is at a level below a 2nd set value, one machining process is stopped to prude interference at the time of the recovery. When the level exceeding the 2nd set value is reached, data required to restart the machining are stored to guarantee the smooth machining restart at the time of the abnormality recovery.;COPYRIGHT: (C)1994,JPO&Japio