Http://www.yousheng1688.com servo system accuracy servo system output deviates from the degree of precision of the input. The accuracy of the servo drive dynamic error, steady-state error and static error of three forms. The servo system allows the deviation are generally in the 0.01 to 0.001mm high precision servo system deviation of ± 0.0001 ± 0.00005mm. The servo system also have certain requirements on the resolution, the resolution of the system depends on the system stable nature of work and the use of position detection elements. The closed-loop servo system to achieve 1um resolution, the resolution of the CNC measuring device up to 0.1um. The accurate detection of the servo drive means may ensure that the signal is not distorted.