A method for measuring and separating cylindrical and spindle errors in machine tool rotational parts

This report examines the measurement of rotational accuracy for machine tools, using the concept of cylindrical error on linear motion. This measurement can be divided into three steps: first, separate the straight-line motion error of the slide track from motional parts of the machine tools; next, choose the basic cross section of cylinder and estimate the errors of cross sections through the three-point error separating method; third, estimate the roundness error of each cross section projected onto the perpendicular basal plane according to the measurement of straight-line error; finally, calculate the value of the radius of the minimum circumscribing cylinder in order to evaluate the rotational accuracy of multi-point cutting machine tools.