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Method and device for disturbance sensing, especially collision sensing, in the drive system of a numerically controlled machine tool

  • US 20010012973A1
  • Filed: 12/15/2000
  • Published: 08/09/2001
  • Est. Priority Date: 12/16/1999
  • Status: Active Grant
First Claim
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1. A method for disturbance sensing in a drive system of a numerically controlled machine tool, in which at least one drive motor for positioning a machine part is coupled via one or more transmission elements to the machine part, the method comprising the steps of:

  • a) measuring a position of the moving machine part directly on the machine part and also indirectly at at least one location in a transmission chain;

    b) comparing the direct and indirect position measured values; and

    c) using the comparison between the direct and indirect positions value to record a disturbance with consideration of the actual operating conditions on fulfillment of a prescribed criterion.

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