Familiar faults about numerical control system of grinding machine were pointed,and the methods to get rid of faults on two parts of numerical control device and servo mechanism were introduced.

• 指出磨床数控系统中常见的电气故障,并主要介绍了数控装置和伺服机构两部分排除故障的方法,是数控磨床维护的良好参照。