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NUMERICAL CONTROLLER

  • US 20180143612A1
  • Filed: 11/20/2017
  • Published: 05/24/2018
  • Est. Priority Date: 11/21/2016
  • Status: Active Grant
First Claim
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1. A numerical controller comprising:

  • a rigid tap control unit that executes a rigid tap by synchronizing rotational speed of a spindle with feedrate;

    a synchronization error monitoring unit that starts or terminates monitoring of a synchronization error between the rotational speed of the spindle and the feedrate at a point R set to a height equal to or higher than a top of a workpiece; and

    a workpiece top detection unit that detects a position of the workpiece top,wherein the synchronization error monitoring unit starts monitoring of the synchronization error at the position of the workpiece top instead of the point R.

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