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Method of calibrating probe pins on multicoordinate measurement machines

  • US 4,523,450 A
  • Filed: 09/20/1982
  • Issued: 06/18/1985
  • Est. Priority Date: 11/07/1981
  • Status: Expired due to Fees
First Claim
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1. A method of calibrating a probe having several probe pins with a probe ball at the end of each pin, wherein the probe is mounted to a self-centering probe-measurement system of a multicoordinate measurement machine, characterized by the fact that:

  • (a) a calibration standard which has several centering elements formed of surfaces which converge towards each other is fastened to the measurement machine, said centering elements being distributed over the standard and facing in different directions,(b) the geometry of the centering elements (shape and distances apart) as determined by measurement is stored in the computer of the coordinate measurement machine, each centering element being imparted an identifier,(c) the orientation of the calibration standard is determined relative to the coordinate system of the measurement machine,(d) each of the balls of the various probe pins is introduced once in self-centering manner into a selected one of the centering elements,(e) the diameters or identifiers of the probe balls or ball used and the identifiers of the associated centering elements are fed into the computer, and that thereupon,(f) a program is called up which, on basis of the data and measurement values fed, computes the relative position of the center points of the probe balls with respect to each other.

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