Troubleshooting / Can seamer

Can Seamer Troubleshooting

The most common can seamer 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:

Double-seam defects (cut-over, false seam, sharp seam)Cans damaged or jamming at the seamerLeakers found after filling and seamingEnd feed faults: no end or two endsProduct splash at seamingSeam measurements drifting between checksLubrication problems on the seamerOxygen pickup in sealed cans

Double-seam defects (cut-over, false seam, sharp seam)

Hits OEE: Quality

Symptoms: Seam teardowns out of spec, cut-over at the crossover, leakers found in incubation.

First or second operation rolls worn or misadjusted
Measure seam thickness, height, body hook and cover hook against spec; reset roll clearances and replace grooved rolls.
Chuck and roll alignment off
Check seaming chuck fit and roll parallelism; a worn chuck lets the can rock during seaming.
Can or end lot variation
Audit incoming cans and ends for flange and curl dimensions; quarantine deviating lots.

Prevention: Scheduled seam teardown checks per seaming head, roll and chuck wear PM, incoming can and end audits.

Cans damaged or jamming at the seamer

Hits OEE: Availability

Symptoms: Dented flanges at the infeed, cans crushed at the lifter, frequent stops to clear wrecks.

Infeed timing off
Re-time feed screws, star wheels and the end feed so cans and ends meet the chuck in phase.
Lifter spring or pressure wrong
Set lifter load to spec for the can size; a weak lifter mis-seats the can under the chuck.
Worn guides and change parts
Replace worn change parts and verify the correct set is installed for the format.

Prevention: Timing verification after jams, lifter load checks, change-part condition audit at every format change.

Leakers found after filling and seaming

Hits OEE: Quality

Symptoms: Low-vacuum or swollen cans in the warehouse, micro-leak rejects, seam looks visually fine.

Compound placement or coverage poor
Check the end lining compound for skips and voids with the end maker; compound gaps leak past a dimensionally correct seam.
Seam tightness marginal
Review tightness rating on teardowns; wrinkle-free hooks with correct overlap still need adequate tightness.
Damage after seaming
Audit conveyors and basket loading for impacts that break the seal after a good seam.

Prevention: Incubation and vacuum checks, teardown tightness ratings trended per head, post-seamer handling audits.

End feed faults: no end or two ends

Hits OEE: Availability

Symptoms: Cans leave without an end, two ends fed, stops at the end feed.

Worn end separator
Replace the separator parts.
Ends nesting or sticking together
Check end stacking and handling with the end supplier.
End stack low or jammed
Keep the end stack loaded and clear jams in the feed.

Prevention: End feed checks at start-up and after end lot changes.

Product splash at seaming

Hits OEE: Quality

Symptoms: Product on the can top and in the seam area, low fill after seaming.

Fill height too high
Check the filler setting for the product.
Jolts between filler and seamer
Smooth the transfer and its speeds.
Undercover gassing set wrong
Check gas flow and nozzle position.

Prevention: Fill height checks and transfer inspection.

Seam measurements drifting between checks

Hits OEE: Quality

Symptoms: Seam dimensions move towards the limits from one teardown to the next.

Seaming roll wear
Trend seam measurements and change rolls before they reach the wear limit.
Chuck wear
Inspect and replace worn chucks.
Lifter pressure drift
Check and set lifter pressure.

Prevention: Seam measurements trended per head, not only checked against limits.

Lubrication problems on the seamer

Hits OEE: Availability

Symptoms: Seamer runs hot, oil leaks, lubrication alarms.

Oil level low or wrong lubricant
Top up with the lubricant the OEM specifies, food grade where required.
Blocked lubrication lines or pump fault
Check the pump and clear blocked lines.
Leaking seals
Replace leaking seals.

Prevention: Lubrication checks every shift and oil changes on a schedule.

Oxygen pickup in sealed cans

Hits OEE: Quality

Symptoms: Dissolved or headspace oxygen above the product spec in finished cans.

Gas supply or pressure low
Check the undercover gas supply.
Gas nozzle position wrong or blocked
Set and clean the gas nozzle.
Seamer speed changed without gas settings
Review gas settings whenever speed changes.

Prevention: Oxygen checks at start-up and after speed or product changes.

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

Related equipment guides: inkjet coder · bottle unscrambler · case packer · HTST pasteuriser · heat-treat furnace · retort · aerosol filler · carbonator · can filler · liquid nitrogen doser

Stop the same fault coming back

Recurring can seamer 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.

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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