Improving accuracy of aging CNC machines without physical changes

Abstract

This study focused on the systematic error compensation of CNC machines via software way. The method is based on machining test pieces, measuring same for finding the systematic errors of a machine, forming an error map and using the map for correcting the tool paths of the NC-program. Technically, it was shown that by measuring the systematic errors of machines and numerically calculating new, compensated parameters, the precision of aging machines could be substantially improved. Resultingly, the method extends the lifetime of an older machine, postponing the need for new investment for several years.