Abstract
One of the causes of accuracy deterioration in 5-axis machining centers is centerline error in the rotational axis of the rotary table. This factor can not be ignored when maintaining accurate machining of high quality workpieces. In this study, the mathematical model of the centerline of rotation uses a directional vector and a center point, which is proposed as a new test method for easily determining the centerline on the shop floor. And two procedures are explained here : first, through manual measurements when a touch probe is not available, and second, with a touch probe and master ball for automatic measurements. By establishing the axis of rotation, an arbitrary point on the table after rotating a certain angle can be calculated. Then, after actually rotating, the master ball center position on the rotary table can be compared to the calculated value. From these results, the effectiveness of the proposed method is experimentally confirmed.
