1. inferior sifting effect control the flow and charge the materials uniformly; adjust sieve meshes in accordance with technical requirements; change ineffective cleaning balls; regulate dip angle, amplitude or change the motor; change rubber spring.

2. too much grain mixed in the small impurities change sieve plate; adjust the clearance; adjust proper sieve mesh.

3. low efficiency to remove small impurities regulate flow; increase the air.

4. Grain mixed in the small impurities increase the flow or make it uniform; decrease wind speed of the vibrating sifter.

5. Grain mixed in big impurities control the production and flow speed; regulate the dip angle; proper sieve mesh; check and clean the sieve cover regularly.

6. Sudden increase of the amplitude control normal flow.

7. Easy block of the sieve mesh proper sieve mesh; correct installation of sieve plate and change regularly; change the cleaning balls of the vibrating sifter; appropriately enlarge or narrow the mesh.

8. Materials go the wrong way revise and level up the foot of the sieve bracket; install the device and correctly regulate it; frequently clean the inlet and sieve cover; adjust the cone cylinder of the vibrating sifter.