本文主要描述闭环CNC系统坐标轴校准的原理与方法,这种思想的基本思想是采用计算机技术与精密测量技术相结合,测定机床直线坐标和旋转坐标的全程分布误差,在计算机内存中建立起反馈增量修正表,从而在CNC运行期间由软件实现对反馈增量的实时修正。采用这种技术不但可以提高加工精度,而且可以放宽对CNC机床本身制造精度的要求,降低成本。 This paper mainly describes the principle and method of the coordinate axis calibration of closed-loop CNC system. The basic idea of ​​this idea is to use the combination of computer technology and precision measurement technology to measure the whole distribution error of linear and rotary coordinates of the machine tool, establish feedback in computer memory Increment correction table so that real-time correction of feedback increments is implemented by the software during CNC operation. Using this technology can not only improve the processing accuracy, but also to relax the manufacturing requirements of the CNC machine itself to reduce costs.