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Coordinate measuring machine

  • US 4,333,238 A
  • Filed: 03/31/1980
  • Issued: 06/08/1982
  • Est. Priority Date: 03/30/1979
  • Status: Expired due to Term
First Claim
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1. A method of determining a measurement of a workpiece on a machine comprising a probe, structure supporting said probe for flexile and translational movement relative to a workpiece to be measured and relative to a means for continually measuring the position of the probe relative to a datum, the probe having means for generating a signal when having a predetermined relationship with a proximate surface of the workpiece;

  • said method comprising the steps of;

    (a) moving said probe toward said surface;

    (b) determining the output of said measuring means at the instant said signal is generated thereby defining the measured position of said probe;

    (c) determining the deflection of said structure at said instant thereby defining the difference between the measured and the actual positions of said probe; and

    (d) subtracting said difference to said output of the measuring means to establish a measure of the actual position of said probe.

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