| 摘要 |
PROBLEM TO BE SOLVED: To provide a numerically controlled(NC) machine tool capable of easily restarting processing after service interruption and preventing the quality of parts from being deteriorated due to service interruption. SOLUTION: When a main power supply 31 in an uninterruptive power supply 15 is stopped, a spare power supply 32 supplies power as a substitution for the main power supply 31. When the main power supply 31 is stopped, an NC processing part 10a continues the processing of parts by utilizing power supply from the spare power supply 32 without instantaneously stopping the processing of parts and stops the execution of a processing program by a succeeding stop command. Thereby the processing can be easily restarted after service interruption and the quality of parts can be prevented from being deteriorated due to service interruption.
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