Research of Spindle Error Separation Mixed Method

This paper introduces a spindle error separation technique called orthogonal mixed method. The problem of harmonic suppression is solved by the orthogonal mixed method, which exists in the process of measurement based on three point method.The measuring system consisting of a displacement sensor and a angle sensor is developed for spindle error and roundness measurement. Two sensors, which are placed in the same plane perpendicular to the spindle axis, are mutual into 900. The principle of the critical angle method of total reflection are used by two sensors to separate rotation error from spindle error. Above all, the measured results show that this method indeed solve the problem of harmonic suppression, make the results of measurement more accurate.