DETERMINING THREAD LEAD OR PITCH ACCURATELY
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United States of America Patent
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Issued Date -
May 2, 2013
app pub date -
Oct 25, 2012
filing date -
Oct 26, 2011
priority date (Note) -
Abandoned
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Abstract
Apparatus and methods are provided for measuring thread leads or pitches using a metrology probe. The probe may be, for example, either a contact probe or a laser probe. The probe is mounted on the end of an articulating arm that has sensors to provide precise three-dimensional coordinates of the probe's location and orientation. The probe determines surface coordinates of the threaded object repetitively in different locations according to a program provided by a computer connected to the arm. When enough data have been gathered, the computer calculates and outputs a surface profile of the threaded object, including a lead or pitch measurement.
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