How to Solve Insufficient Screening Accuracy of Vibrating Screens

update time：2026-04-09 Click count：4次

Low screening accuracy of vibrating screens is not caused by a single factor, but usually results from a combination of screen mesh, equipment parameters, operation methods, material characteristics and equipment structure. Troubleshooting in the order of "from easy to difficult" can quickly locate problems and carry out efficient improvements without blindly replacing equipment.

1. Screen Mesh Problems: The Main Culprit of Poor Screening Accuracy 

The screen mesh is the core component of vibrating screening, and 80% of accuracy issues are related to it. Screen mesh clogging, wear, looseness or incorrect selection will directly lead to low screening penetration and chaotic classification.

Mesh clogging

It easily occurs when materials have high humidity, high mud content, fine powder adhesion, or particle size close to the mesh openings, sharply reducing effective screening area.

Solutions: Stop the machine to thoroughly clean the screen mesh; install bouncing balls, ultrasonic cleaning devices or water spraying devices; properly increase the screen surface inclination to speed up material flow and avoid accumulation and adhesion. 

Mesh wear or damage 

Long-term high-frequency vibration and material friction will enlarge or deform mesh openings, even cause cracks, allowing coarse particles to pass through directly and losing accuracy completely.

Solutions: Inspect the screen mesh regularly; repair slightly worn parts locally; replace severely damaged mesh with high-quality ones of the same specification, and avoid non-standard mesh affecting screening accuracy.

Insufficient mesh tension 

Loose or sagging mesh leads to uneven material bouncing on the screen surface and insufficient stratification.

Solutions: Retension the mesh with special tools to ensure consistent tension on both sides; the mesh should sound crisp when tapped gently without looseness or sagging.

2. Unreasonable Vibration Parameters: Incorrect Material Movement Track Amplitude, frequency and exciting force of the vibrating screen directly determine the movement state of materials on the screen surface. Improper parameter settings will cause materials to fail to bounce, accumulate, or splash too fast with insufficient screening time.

Fine and ultra-fine materials are suitable for high frequency and small amplitude to accelerate fine material penetration.

Coarse and large particles are suitable for low frequency and large amplitude to ensure full loosening and stratification.

Conventional vibrating screen amplitude is controlled at 3–5 mm, frequency at 1500–3000 r/min. Calibrate the angle of dual-motor eccentric blocks to ensure uniform and symmetrical exciting force and avoid screening deviation caused by unbalanced unilateral stress. 

3. Improper Operation and Feeding: Human Factors Reducing Accuracy 

●Uneven or excessive feeding 

Material accumulates on one side or forms an overly thick layer, so bottom materials cannot contact the mesh, resulting in incomplete screening.

Suggestion: Control feeding volume within 80% of rated capacity; install distributors and deflectors to spread materials evenly on the screen surface.

- Inappropriate screen surface inclination 

Small inclination slows material flow and causes clogging; excessive inclination makes materials slide too fast with short screening time.

Inclination of linear vibrating screen: 5°–10°; circular vibrating screen: 16°–20°, adjustable as required.

4. Basic Problems of Equipment and Materials 

-Poor equipment levelness or loose screen frame 

Calibrate the equipment with a level gauge; ensure horizontal deviation in longitudinal and transverse directions is less than 0.5°; fasten bolts of the base and screen frame, and replace aged damping parts.

-Moist and agglomerated materials 

Dry and disperse materials in advance, reduce moisture content, and minimize adhesion and clogging.

5. Custom High-Precision Solutions 

If existing equipment is old, accuracy still fails to meet requirements after improvement, or customized high-precision screening equipment is needed, choose a reliable vibrating screen manufacturer in Xinxiang. 

As a source factory, Xinxiang Senyou provides customized equipment based on material characteristics, output demand and accuracy requirements, thoroughly solving insufficient screening accuracy. We also offer one-stop services including installation, commissioning, after-sales maintenance and spare parts supply. Prices of vibrating screens in Henan are affected by model, material, layers, configuration and customization requirements. For above issues, please consult our sales team. In conclusion, to solve insufficient screening accuracy of vibrating screens, first troubleshoot and improve screen mesh, vibration parameters and feeding operation — most problems can be resolved quickly. For equipment replacement or new procurement, prioritize Xinxiang Senyou as your trusted vibrating screen manufacturer.