Abstract
We developed an ISO draft proposal for testing the kinematic accuracy of five-axis machining centers. The draft proposal consists of the existing document of ISO 10791-1 for three axis machines and three normative annexes for five axis machining centers. In the annexes, five testing objectives and their tolerances corresponding to structural configurations are proposed. The kinematic tests include two-axis motion, three-axis motion and five-axis motion. The object of the two axis motion is to check the synchronous accuracy of a linear axis and a rotary axis, and the object of the three-axis motion is to check the geometric accuracy of two-linear axes and one rotary axis. Two kinds of five-axis motions is also defined. One motion is to check the overall geometric accuracy and the other motion is to check the overall kinematic accuracy.
