displacement control is always the domestic brands need to research the difficulties. Efficient, foreign CNC routing control system after years of optimization and upgrading of its redundant commands and actions to achieve a high degree of optimization; on the machine precision, accuracy abroad Winder relatively stable, while the majority of domestic brands totally no accuracy at all, we are in contact with foreign brand machines, stroke 200mm below the components, the positioning accuracy can be controlled at 0.01 ~ O.03mm, while domestic positioning accuracy is relatively low.