The whole machine frame adopts profile welding and manual aging treatment. The machine body is not deformed. The sanding machine runs more firmly, stable and reliable. Choose the servo motor to achieve the accuracy of 0.01mm. With a central information processing system,every electromagnet has independent adjustment and control function, uniform sand pressure force, spesial Angle protection function, so that the thickness of uneven plate can be obtained uniform sanding. The feeding end is equipped with a sensor, which reduces the distance of scanning to 16-22mm, so as to control the scanning accuray more precisely