In the test of high speed precision spindle ,the high speed may make error separation impossible In this paper, model analysis is applied to testify the possibility of error separation Then the error due to testing with precision spindle instead of precision ball is analyzed, and the setup error of sensors is analyzed as wel

In the measurement of rotating error of spindle, surface errors of the test piece ismixed with the rotating errors inevitably, in the case of the measurement ofultra-precision spindle, the mixed surface errors shouldn’t be neglected, therefore,Research on the measurement of rotating errors is focused on Error SeparationTechniques.