This machines consisted of the hopper, vibration chamber, clutch, motor etc. The vibration chamber is equipped by eccentric wheel, rubber soft pieces, man shift, bearings etc. When the adjustable eccentric weight passed its gravity to the central line of main shift by the driving of motor to break the balance, then under the centrifugal force, the orbit spire of target materials is forced to change its way in the chamber. The size of swing of the weight regulator can be adjusted according to different kind of target material or the number of mesh, The whole machine has the specialties of compact structure, small volume, non-dust flying, low energy consumption, easy to be moved and maintained.