Abstract
Error detection and compensation technology is an economical and effective method for improving the precision of CNC machine tool. The paper established the geometric errors model of three-axis CNC milling machine based on homogeneous coordinates transformation theory. Error detection is tested by digital ball bar and error compensation software is developed for XK7132 milling machine, the compensation effect is evaluated by a laser interferometer. The results show that the precision of CNC milling machine is improved effectively by the proposed method.
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