Abstract
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.
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