| Aiming to processing simulation and precision measuring in the field of numerical control at present, this paper develops the NC processing graphics simulation system and machine tool revolution precision measuring instrument for 6PM2 NC serial-parallel machine developed by institute of machine automation of XAUT itself. Adopting MATLAB 6.5's data visual technology and programme language based on matrix/array, the graphics simulation system eventually succeeds in showing NC process on the computer according to NC code. Chapter two and three in this paper deeply discuss bending surface modeling of 3-D figure and predigested modeling of machine tool, introduce the figure's motion exchange processing and especially bring forward a method of model data substitution aimed to show the milling process. The two chapters then discuss how to change actual NC code into model driving code in simulation environment, and thus develop a NC code interpreter model.The latter section of this paper introduces a new-type machine tool revolution precision measuring instrument after analyzing current revolution precision measuring technology. This instrument includes several widely used high precision measuring instruments. It can measure the location precision and repetition location precision and precisely reflect dynamic capability of the machine tool revolution. It can also measure the absolute angle between two random planes. This section discusses its basic principle and succeeds in exerting full-closed loop control on it using the motion controller.The processing experiment proves that it is successful for NC processing graphics simulation system. Meanwhile the experiment successfully implements error compensation to NC processing precision preliminarily.
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