Five-axis RTCP functional machine tool can calculate the deviation of rotary displacement caused by the tool point

translating the linear axis to ensure that the coordinates of tool center point are fixed in workpiece coordinate system. Therefore

compared with machine tools without RTCP function

it can avoid the complexity of program control and improve the control accuracy. The key of RTCP control technology is to select the fixed parameters of machine tool model

that is

whether the RTCP parameters are accurate or not

and the measurement accuracy of RTCP parameters directly affects the control performance of machine tools. In this paper

the universal RTCP algorithm and RTCP calibration technology are studied based on the five-axis machine tool with HNC–8 double pendulum head structure of HNC system. The calibration method of RTCP double pendulum head is proposed

and the control accuracy of five-axis machine tool is tested and verified. Compared with traditional measurement technology

the proposed calibration algorithm improves the measurement efficiency while greatly improving the measurement accuracy.