controlled machine tool in now in the machine-building industry the

important position and the huge benefit, had demonstrated it in the

key industry modernization's strategic function, and has become the

traditional machine manufacture industry promotion to transform

and to realize the automation, the flexibility, the integrated

production important means and the sign. The numerical control

technology and numerically-controlled machine tool's widespread

application, for machine-building industry's industrial structure, the

product type and the scale as well as the production method have

brought the revolutionary change. The numerically-controlled

machine tool is the modern processing workshop most important

equipment. Along with the modern technique of manufacture's

development, the enterprise selects the numerical control

equipment already is ultimately. I am at the practice company main

product is the communication foundation equipment and the remote

sensing product. The axis, the housing and the lap and so on

manufacture is mainly with the numerical control lathe, the

machining center and the numerical control milling machine, the

drilling machine and so on completes. But will meet the electric

control system unavoidably in the numerical control lathe in the

work process the breakdown, for this reason, this paper will

introduce the numerical control lathe's electric control system

common breakdown diagnosis.

Keywords ： Numerical control machine tools Characteristics,

Electrical maintenance, fault