Positioning accuracy improvement method for numerically-controlled machine tool or industrial robot

摘要

The positioning accuracy improvement method determines the optimal transformation parameters (TP) for cinematic transformation of the geometric relationship between positioning motor parameters and the position of a working point. This is effected by providing coarse approximation values for the transformation parameters and measuring a set of working points and motor parameters for a number of different points within the work space. The coarse approximation values for the transformation parameters are corrected to minimise the difference between the measured working point positions, and the calculated working point positions obtained via a forwards transformation process.