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Calibration of a contact probe

  • US 9,863,766 B2
  • Filed: 06/26/2014
  • Issued: 01/09/2018
  • Est. Priority Date: 06/28/2013
  • Status: Active Grant
First Claim
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1. A method of calibrating a contact probe having a contact element, the method comprising:

  • measuring with the contact probe a first geometric property of a calibrated artefact and a second geometric property of the or a further calibrated artefact, the first and second geometric properties being such that a deviation between a measured value and the expected value, resulting from a difference between an effective diameter of the contact element and an assumed diameter used for determining the measured value, has the opposite sign for each of the first and second geometric properties;

    identifying a difference in the effective diameter of the contact element from the assumed diameter comprising comparing deviations of the measured value to the expected value for each of the first and second geometric properties to determine whether there is a difference in the deviations; and

    determining an effective diameter of the contact probe from the measurements of the first and second geometric property.

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