Abstract: Based on the structure of 6-TPS parallel kinematic machine tools (PKMT) with 6 degrees of freedom(DOFS),the procedure to generate control data is introduced. Locating workpiece coordinate system and getting position and orientation of the mobile platform are two necessary issues in the process of postprocessing. Two measures, comprehensive error coefficient and comprehensive error degree, are defined to evaluate the precision for various configurations of this type of machines, and the locating of workpiece coordinate system is treated as a nonlinear programming which aims at guaranteeing workspace and improving machining precision. A method to get 6 DOF poses of mobile platform from 5 DOF cutter location data is presented. Interpolating algorithm in Descartes coordinate system is investigated and the results about the cutter trajectories produced by two different interpolating methods are given. At last, a postprocessor based on these algorithms mentioned above is introduced and its data flowing is set forth.

Key words: Parallel kinematic machine tools NC machine tools, Postprocessing algorithm Postprocessor, Angle measurement, Ball hinge, Equivalent magnetic charge, Hall sensor