The research on precision detection of NC machine based on multistation and time-sharing measurement

Aiming at the disadvantages of present methods for detecting machine geometrical precision, the multistation and time-sharing measurement method is used to detect the machine precision in the research. Laser tracker measures the same trajectory of the machine at different base stations successively. Then the coordinates of different measuring points in the machine motion process can be calibrated by a large amount of measured data. Only displacement is involved in the measurement process, and the method does not measure angle, therefore it has very high measurement accuracy. In the end, the 21 terms machine errors can be separated by a large number of measuring point coordinates. The method has high measurement accuracy and low cost, so it is particularly suitable for high grade NC machine in the geometric precision detection.