Rotary vibrating screen is a kind of high-precision fine powder sieving machine with low noise and high efficiency. It takes 3-5 minutes to quickly change the net.The rotary screen is driven by a vertical motor. The upper and lower ends of the motor are equipped with eccentric weights. The rotating motion of the motor is transformed into a horizontal, vertical and inclined three-dimension motion, which is then transmitted to the screen surface.By adjusting the phase Angle of the upper and lower ends, the movement track of the material on the screen can be changed.85% by 75% without increasing the resistance loss.