Solution: 1. Stop the machine and check the pressure inside the accumulator is normal or not; check the circulating load is large or not; check whether the fine powders mixed in the materials are too much or not; check whether the hydraulic valve is leakage or not.
2. The large circulating load will cause the materials that enter into the roller presser contenting much fine powder, thus leading to uneven feeding, large fluctuation of roller pressure, and large roller gap deviation. If found the above situation, should adjust the process in time.
3. If the both side fluctuation are caused by hydraulic valve leakage, should repair or replace this parts.