Abstract
The velocity of each axis is greatly changed when 5-axis machining centers are used to machine complex shapes. It is, therefore, the synchronous accuracy of rotary axes and translational axes is an important factor, when generating high accurate shapes. In this study, a dynamic model of the each axis including a rotary axis (C-axis) is developed, and synchronous motions of rotary axis and translational axes are simulated. In order to compare with the simulation results, experimental works were also carried out The synchronous accuracy of C and XY axes was measured using a ball bar system. In addition, a grid encoder system was .applied to detect the position of the translational axes.
