Abstract
This paper proposes a measuring method of geometric accuracy of 5-axis machining centers by means of one ball and one displacement sensor instead of the ball bar system. The device of the method of using the ball as a measurement reference is more low-cost than that of the ball bar and can be applied to the small machine. To confirm the effectiveness of this measuring method, it was applied to the measurement of a real machine. As a result, the same measurementresults as the ball bar were obtained for the angular deviation. However, there is a problem to be solved for a positional deviation.
