Film threaded wrong (missed roller / wrong path) = instant tearing
Film Breaking
Film snapping during a wrap cycle is usually down to one of three things: film quality/spec, carriage setup (tension / pre-stretch / threading), or a snag point on the load or machine. Use the checks below to identify where it’s failing and get the wrapper running reliably again.
Common things we see on site
Load overhang / sharp edges snagging film (breaks at the same point)
Dirty film-break sensor / detect arm sticking (false “break” triggers)
Carriage cover/guard loose (film catches on a moving edge or fastener)
Does This Look Familiar?
Common symptoms when film keeps breaking:
- Film snaps as soon as the wrap starts (usually threading / tension / pre-stretch)
- Film breaks at the same height every cycle (snag on load edge / damaged roller area)
- Breaks during carriage up/down travel (carriage alignment / roller drag / film track issue)
- Film “necks down” and tears (tension too high or wrong film spec for the job)
- Only breaks on certain products (sharp corners, voids, unstable loads)
Typical Causes Behind This Fault
- Film not threaded correctly through the carriage rollers / dancer arm
- Tension or pre-stretch set too high for the film spec (micron / grade)
- Wrong film spec for the load (too thin / poor puncture resistance)
- Snag on the load (sharp corners, loose straps, protruding cartons, broken boards)
- Damaged/dirty roller(s) creating drag (nicked roller edge, seized bearing, debris)
- Carriage alignment issue (film tracking off-centre and tearing)
- Film-break detect arm/sensor sticking or misadjusted (false trips / harsh braking)
Quick sanity check: If film breaks instantly, focus on threading and tension/pre-stretch.
If it breaks at the same height every time, focus on a snag point on the load or carriage path.
What To Check First (In Order)
- Threading path: re-thread exactly as per the diagram on the carriage (don’t “shortcut” rollers)
- Film roll orientation: confirm the roll is mounted the correct way round for your machine
- Pre-stretch / tension: reduce slightly and test (small changes make a big difference)
- Roller condition: spin rollers by hand—any roughness, flat spots, or sticking = drag
- Snag points: check load edges, corners, loose straps, broken pallet boards, protrusions
- Carriage tracking: is the film walking to one side and rubbing an edge?
When To Call Us
If you’ve checked threading and reduced tension, but film still breaks, it’s often a mechanical/electrical issue inside the carriage.
- Rollers/bearings are dragging or seized
- Pre-stretch gearbox/belts slipping or binding
- Carriage alignment is off (film tracking into an edge)
- Film-break sensor/detect mechanism is sticking or misreading
- Inverter/drive settings have been altered and need putting back to spec
Tip: If you can, note where the film breaks (start / mid-wrap / same height),
and take a quick photo of the threaded path on the carriage — it massively speeds up diagnosis.
When It Needs An Engineer
If the stretch film keeps snapping during the wrap cycle despite basic checks, it’s usually quicker to have the carriage setup and film path inspected properly rather than increasing tension or forcing restarts.
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Film tension or pre-stretch set incorrectly for the load
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Damaged rollers, sharp edges, or worn film guides
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Pre-stretch unit not running smoothly or slipping
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Inconsistent film quality or unsuitable film specification
At this stage, structured fault-finding is usually more effective than repeated adjustments — particularly where pre-stretch units, rollers, or film paths are involved. Film breaking often indicates mechanical wear or incorrect setup that needs addressing before it causes further damage or excessive film waste. Our engineers work across all major pallet wrapper brands and control systems.
Service context
Part of our wider Packaging Machine Repair support
This pallet wrapper fault page sits within our engineer-led, multi-brand Packaging Machine Repair & Breakdown Support.
Request Pallet Wrapper Support
Send us the machine make/model (if known) and the symptoms you’re seeing. A quick photo of the display or fault helps speed things up.
You’ll get the quickest response by including the fault symptoms and any error message.