一、前言从一九五二年第一台数控机床在美国诞生以来,至今虽只短短的三十年,但数控装置已经历了电子管数控、集成电路数控、计算机数控(CNC)和微处理机数控(MNC)五代演变。随着数控装置的不断更新换代,系统的可靠性、稳定性越来越高,体积越来越小,性能越来越好,成本越来越低。因此 I. Introduction Since the first CNC machine tool was born in the United States in 1952, although only a short span of 30 years has passed since, numerical control devices have undergone electronic tube numerical control, integrated circuit numerical control, computer numerical control (CNC) and micro-processing Machine NC (MNC) five generations of evolution. With the continuous upgrading of numerical control devices, system reliability, stability, higher and higher, smaller and smaller, better and better performance, lower and lower costs. therefore