GEOMETRIC-ERROR IDENTIFICATION SYSTEM AND GEOMETRIC-ERROR IDENTIFICATION METHOD
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United States of America Patent
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Issued Date -
Apr 28, 2016
app pub date -
Sep 10, 2015
filing date -
Oct 27, 2014
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Abstract
A geometric-error identification system includes a control unit configured to identify geometric errors in a machine. The machine controls three or more translational axes and one or more rotation axes so as to perform positioning for a positional relationship between a main spindle and an object. The control unit controls the rotation axis so as to index a measurement object jig, measures an indexed position of the indexed measurement object jig on a three-dimensional space using a position measurement sensor attached to the main spindle so as to acquire a measurement value, and identifies geometric errors of the machine related to the translational axis and/or the rotation axis based on the measurement values in a plurality of positions. The control unit measures an initial position of the measurement object jig and performs calibration of the position measurement sensor using an initial measurement value acquired for measuring the initial position.
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