... rotary encoderadvantage:1,the high precision digital readout is specialization design,elegant appearance ,high speed of numeation,multy ... ,good shield.3,independent power,widely used,high stabilization,capacity of resisting disturbance well4, the ... well 2.the lathe has a low precision 3.The running speed is too fast ... scale is not up to standard.low precision 5.The resolution of the digital readout ...