Troubleshooting / Vibrating screen

Vibrating Screen Troubleshooting

The most common vibrating screen problems on the plant floor, with the likely causes and the fix for each. Part of the OEE Lab troubleshooting directory.

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Problems on this page:

Poor screening or blindingLow throughput or material build-upExcessive vibration or structural cracksMesh tearing earlyFeed not spread across the deckExciter or motor bearing failureDust escapingOut of balance after maintenanceOversize found in the product

Poor screening or blinding

Hits OEE: Quality

Symptoms: Oversize in product, blinded/pegged mesh, poor separation.

Blinding or pegging of the mesh
Use anti-blinding screens/ball decks; clean the mesh.
Wrong stroke, speed or angle
Tune the stroke, speed and inclination for the material.
Worn or wrong mesh
Replace mesh; select the correct aperture/type.

Prevention: Anti-blinding setup, correct motion, mesh management.

Low throughput or material build-up

Hits OEE: Performance

Symptoms: Reduced capacity, material pooling, carryover.

Overloading or uneven feed
Spread and meter the feed across the width.
Insufficient stroke/G-force
Set the correct stroke and counterweights.
Moisture or sticky material
Manage moisture; use heated/anti-stick measures.

Prevention: Even feeding, correct motion, moisture control.

Excessive vibration or structural cracks

Hits OEE: Availability

Symptoms: Abnormal vibration, cracks in the body, loose fixings, stops.

Cracked side plates or welds
Inspect and repair the structure; follow OEM limits.
Worn springs or imbalance
Replace springs/isolators; check exciter balance.
Loose fasteners or bearings
Torque fixings; service exciter bearings.

Prevention: Structural inspection, spring/bearing care, fastener checks.

Mesh tearing early

Hits OEE: Availability

Symptoms: Screen meshes tear long before their expected life.

Mesh not tensioned correctly
Tension the mesh as the maker specifies.
Feed dropping straight onto the mesh
Fit an impact plate or feed box.
Worn support rubbers
Replace the supports.
Mesh not suited to the duty
Choose a mesh for the material.

Prevention: Mesh life recorded per position.

Feed not spread across the deck

Hits OEE: Performance

Symptoms: Material runs down one side and the rest of the deck is idle.

Feed chute off-centre
Centre the chute.
No distributor
Fit a feed distributor.
Screen not level across its width
Level the screen.

Prevention: Bed depth checked across the deck.

Exciter or motor bearing failure

Hits OEE: Availability

Symptoms: Bearing heat, noise, and finally a seized exciter.

Lubrication wrong or missed
Lubricate as the maker specifies.
Contamination in the bearings
Check the seals.
Stroke set too high
Check the stroke against the design.

Prevention: Bearing temperatures on the route.

Dust escaping

Hits OEE: Quality

Symptoms: Dust around the screen and the floor below it, dirty surroundings and an exposure risk for operators.

Cover seals worn
Replace the cover seals and clamps.
Extraction weak
Check the extraction hood, ducts and fan.
Flexible connections torn
Replace the flexible connections at the inlet and outlets.
Covers left open after a mesh change
Close and clamp every cover before restart.

Prevention: Dust checks on the route.

Out of balance after maintenance

Hits OEE: Availability

Symptoms: Vibration or wrong motion right after a motor or weight change.

Exciter weights set unequally
Set the weights to the maker's settings.
Twin motors turning the same way
Check they counter-rotate.
Parts missing
Check every part was refitted.

Prevention: Motion checked after any exciter work.

Oversize found in the product

Hits OEE: Quality

Symptoms: Oversize particles turn up in the screened product.

Hole in the mesh
Inspect the mesh and patch or replace it.
Mesh seals leaking at the deck edges
Reseal the mesh edges.
Wrong mesh fitted after a change
Check the mesh size against the specification.
Material bypassing at the feed box
Check the feed box and its seals.

Prevention: Mesh inspections at every shift start.

Guidance only. Always follow lockout/tagout and your site's safe-work procedures, and verify against OEM manuals before acting.

Related equipment guides: conveyor · screw conveyor · spiral conveyor · bucket elevator · pulper · tile press

Stop the same fault coming back

Recurring vibrating screen stops usually trace to a cause you cannot see by hand. The partner we recommend is Fabrico: it tracks OEE and downtime live from PLCs, IoT sensors or AI cameras; where cameras are fitted, the video of a stop sits next to its machine data so the cause can be reviewed; and a technician opens the work order from the stop in the same system. Data is hosted in the AWS EU region, and Fabrico and the company behind it hold ISO/IEC 27001, ISO/IEC 20000-1 and ISO 9001.

Book a Fabrico demo
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Related tools: full troubleshooting directory · OEE calculator · downtime cost · MTBF / MTTR · glossary

Methods that cut recurring stops: the six big losses · root cause analysis · preventive vs predictive maintenance · TPM · SMED & changeover