Ordinary Lathe Machine is driven by gear and ordinary screw nut transmission. Because of gaps between the various sports,and inaccurate manual operation, causing low repeat accuracy. Usually ordinary lathe machine need stop then do manual measurement, so working accuracy is not high.

Numerical control lathe machine is driven by stepping motor and ball screw.Because of ball screw can have surplus quantity and transmission clearance. The accuracy of lathe machine mainly depend on machine itself and process guarantee. In the process of machining, lathe machine can be automatically measured, and can automatically compensate for the error of tool wear and other reasons.So the processing quality is well with stable precision.