ZS series circular vibrating screen is composed of a hopper, an oscillating chamber, a coupling and a motor. The oscillating chamber is composed of an eccentric wheel, a rubber software, a main shaft and a bearing. Adjustable eccentric weight by motor drive to the centerline of main shaft, in a state of imbalance produces centrifugal force, the strength of material change, form vortex in the sieve. The amplitude of the weight adjuster can be adjusted according to different materials and screen