Abstract
In order to reduce the setup time, 5-axis controlled machining centers are recently used for the production of general machine parts. Therefore, 5-axis controlled machining centers with higher working accuracy have been required. However, the evaluation method of kinematic performance of such 5-axis machining centers has not been investigated. In this study, a ball-bar technique is applied to the measurement of the 3-axis simultaneous control motion, and the factors that affect to the kinematic performance are discussed. The measured results show that the wear of the worm gear affects to the rotational accuracy of the rotary axis. It is found that the worm gear causes the fluctuation in the rotational speed of the rotary axis.
