In many feed mills, vibrating screens are often considered simple auxiliary equipment.

But in actual production, unstable screening performance can directly affect:

• pellet quality
• powder ratio
• production capacity
• feed appearance
• equipment stability

When problems such as screen blockage, uneven material flow, or abnormal vibration appear, many operators first think the machine is damaged.

In reality, most vibrating screen problems can be identified and solved through proper inspection and adjustment.

This article summarizes common vibrating screen problems, possible causes, and practical solutions to help feed mills improve screening efficiency and maintain stable production.

Material accumulates on one side of the screen surface while the other side remains underutilized.

This often causes unstable screening efficiency and uneven material flow.

• Improper inlet position adjustment
• Incorrect position of the material distribution plate
• Wrong vibration motor rotation direction

• Adjust the feeding inlet position
• Correct the material distribution plate position
• Ensure the two vibration motors rotate in opposite directions

Stable and even feeding is one of the most important conditions for good screening performance.

Too much material stays on the upper screen surface and cannot pass through normally.

• Excessive feeding volume
• Screen mesh blockage
• Screen opening too small

• Reduce feeding quantity
• Clean the screen surface regularly
• Replace with a larger mesh size if necessary

Blocked screen mesh is one of the most common reasons for low screening efficiency in feed processing plants.

Qualified pellets or powder appear in the oversized material outlet.

This reduces final product yield and increases material waste.

• Feeding volume too high
• Blocked screen mesh
• Screen opening too small
• Vibration direction angle too small

• Adjust feeding rate
• Clean blocked screen mesh
• Use a larger screen opening
• Increase the vibration direction angle properly

Correct vibration angle adjustment helps improve material separation efficiency.

Large particles or impurities appear in the fine material discharge.

• Lower screen mesh opening too large
• Damaged screen mesh
• Poor sealing between screen frame and screen body

• Replace damaged screen mesh
• Select suitable mesh size
• Check and eliminate sealing gaps

Regular screen inspection helps maintain stable product quality.

Unusual knocking or vibration sounds during operation.

• Loose screen frame locking structure

• Tighten all fastening components

Ignoring abnormal noise may eventually cause structural damage or unexpected downtime.

The vibrating screen operates weakly or vibrates irregularly.

• Worn or aged rubber springs
• Damaged vibration motor bearings
• Two motors rotating in the same direction

• Replace rubber springs
• Replace motor bearings
• Ensure motors rotate in opposite directions

Stable vibration amplitude is critical for maintaining good screening efficiency.

Material stays on the screen surface and does not move smoothly toward the discharge outlet.

• Incorrect motor rotation direction
• Small screen inclination angle
• Insufficient vibration amplitude

• Adjust motor rotation direction
• Increase screen inclination angle
• Adjust vibration amplitude properly

Proper material flow helps improve both capacity and screening accuracy.

The vibrating screen cannot meet expected production output.

• Improper vibration direction angle
• Slow material movement speed
• Poor screening efficiency

• Adjust vibration motor angle
• Optimize material flow speed
• Balance screening efficiency and production capacity

Higher vibration is not always better.

Correct parameter matching is more important than simply increasing vibration force.

To maintain stable vibrating screen performance, feed mills should pay attention to:

Blocked mesh directly reduces screening efficiency.

Uneven feeding creates unstable material distribution.

Proper vibration amplitude and direction angle improve material separation performance.

Regular inspection of:

• vibration motors
• rubber springs
• screen mesh
• fastening components

helps reduce unexpected downtime.

A vibrating screen is not just a simple screening machine.

It directly affects:

• feed quality
• powder control
• production stability
• final product consistency

Many screening problems are not caused by machine failure, but by improper adjustment, maintenance, or operation.

Systematic troubleshooting and correct parameter adjustment can significantly improve vibrating screen performance and reduce long-term operating costs in feed mills.

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