| 摘要 |
When an operation state of a numerical controller which controls a machine tool is (1) in a state were rotation of a spindle is being stopped, (2) in a state where cutting feed rate of a tool with respect to a work exceeds a set maximum cutting feed rate corresponding to a work material, or (3) in a state where the tool moves in a direction different from the work cutting direction of the tool, it is checked whether or not the tool and the work interfere with each other. In other operation states, an interference check is not executed.
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