| 摘要 |
PROBLEM TO BE SOLVED: To provide a working method which can prevent a hole from being not passed through and a spindle from being broken when a single work is carried out by using a drill with a large diameter in the spindle with high maximum rotating speed. SOLUTION: When a response position of a Z-axis does not reach a prescribed range within a prescribed time, the drill is temporarily raised to a cutting start position to repeat a position command procedure to the Z-axis. When the response position reaches the prescribed range within the prescribed time before the number of repetitions exceeds a designated number of times, the drill is moved to a next working position. When the number of repetitions exceeds the designated number of times, an alarm is outputted to stop a working operation. COPYRIGHT: (C)2011,JPO&INPIT
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