Circular test for three-coordinate measuring machines and machine tools

Abstract Today, two principles are used in testing the accuracy of three-coordinate measuring machines and machine tools: measurement of the machine components, and measurement (or production) of master-pieces. Both methods are in themselves insufficient to fulfil the users' demands but combining the two should lead to better results. In the circular test a standard disc is used. The disc is measured in different positions in the working area of the machine. The calculated mean square fit diameters, standard deviations and Fourier analysis result in an analysis of the error sources and of the geometric error components