Measurement of Error in Angular Motion of Rotary Axis

In this paper,the principle and method of measuring error in angular motion of rotary axis are discussed The errors in angular motion for precise swivel-table and centre supporing rotary axis are measured respectively.The measuring precision is estimated and the measured data are processed with microcomputers.The relation of the angular motion precision of the centre supporting rotary axis to the error of the centre and centre hole roundness is analyzcd with the corresponding conclusion obtained.