Method of calibration of a mathematical model of a coordinate measuring machine for the compensation of dynamic errors due to deformation
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United States of America Patent
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Oct 4, 2016
Grant Date -
Jul 4, 2013
app pub date -
Jul 5, 2012
filing date -
Jul 6, 2011
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Abstract
A method of calibration of a mathematical model for the compensation of errors due to dynamic deformation of a measuring machine equipped with a mobile unit able to move a stylus probe in un measuring volume, wherein the model provides, in response to at least one input quantity correlated with a control signal of said drive means, a plurality of output quantities comprising at least one component of the measurement error introduced by the deformation and at least one quantity detected by a laser sensor and correlated with the deformation. In the calibration step, the mobile unit is subjected to a movement cycle constituted by small-amplitude oscillations of variable frequency, following the law of sinusoidal motion, keeping the tip of the probe blocked; during the movement cycle, the input and output quantities are sampled and supplied to an algorithm for model identification.
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