Model: EV-3020NC, 4030NC EV-NC Series Complete Automatic Vision Measurement Machine is specially designed for medium-sized or mini-sized batch repeat inspection. They feature low price level, easy operation and powerful performance, are particularly applicable for medium-sized or mini-sized batch spot check purpose. EV- NC series is equipped with SPC software that developed by Easson so that the users can statistically analyze the measuring datum with a view of understanding the error developing trend of production process, make sure to find and correct the problems during production process, in order to prevent serious mistake and waste in every step In production. SPC software provides a range of control diagram and method, such as Xbar-R, Xbar-S, Xmed-R, X-rm etc., and various of diagram representations, for example, straightness, crossing, cube, connecting line and so on which makes the quality control easier and greatly improve efficiency of quality control.