This paper introduces an innovative method of CNC lathe accuracy measuring, by the combined use of PC and optical-grid reading.

The piezoceramics linear driving system of closed loop control combined with a raster rule of high distinguishability is applied in the machine to meet the demand of microfabrication.

The electric-hydraulic servo system can control the synchronization of two cylinders. Combined with high synchronization cont rolaccuracy, and higy bending and repetitive positioning accuracy.