Computer Vision in Pulp and Paper Mills: Winders, Sheeters and Packing

Your paper machine runs around the clock and reports to a DCS. A QCS scanner measures the sheet, and web inspection watches for holes. Yet in the finishing hall, stops at the wrappers, sheeters and packing tables are often written on paper, and some stations have no count at all.

This page is for plant managers, production and CI leads in paper and board mills who are choosing how to put cameras in a mill to count output and get OEE.

It covers the paper machine and the finishing hall: winding, sheeting, wrapping and packing. Tissue converting lines are covered in computer vision for household products, and corrugated and carton plants in computer vision for packaging converters.

Computer vision in a paper mill: two different jobs

Two kinds of camera system get sold to paper mills under one name. Web inspection checks the paper itself, metre by metre. OEE cameras count output and show you what happened at a stop.

Web inspection, break monitoring and the QCS stay in place. The two jobs work side by side. Rolls that are downgraded or rejected after inspection can feed the quality part of OEE through a count or a signal, so rejects are counted once. For where the line sits machine by machine, read camera or sensor for OEE, machine by machine.

Where the losses hide in a pulp and paper mill

Cepi's key statistics release for 2024 says its members are 470 companies operating 842 mills across Europe, and that packaging paper and board production rose 6.7% in 2024. In the US, the Bureau of Labor Statistics counted about 353,000 people in paper manufacturing in October 2026, a preliminary figure for the whole subsector: pulp, paper and converted paper products.

The paper machine is a continuous web

The 2009 ENERGY STAR guide for the US pulp and paper industry from Lawrence Berkeley National Laboratory describes the wet end plainly: the forming fabric forms the fibres into a continuous web while water drains away. After the press and dryer sections and the calender, the finished paper is wound on a large reel.

That machine is run from a DCS, measured by a QCS and often watched by web inspection. Mills already track its time efficiency, speed and saleable tonnes. A camera adds little here. Read the signals you already have.

Web breaks: count them from the DCS

A web break stops saleable production until the tail is threaded and the sheet is back on the reel. Paper made in the meantime goes to the pulper as broke.

Count breaks from the DCS, not from a camera. Book the time from break to good paper on the reel as an availability loss, with a break code by section: wet end, press, dryer or reel.

Grade changes

A grade change moves basis weight, furnish, colour or speed while the machine keeps running. Until the QCS shows the new grade in spec, the reel is off-spec and often goes back as broke.

Book grade changes with their own code, and track minutes from last good reel to first good reel for each grade pair. The QCS knows when the sheet is in spec. Again, a camera adds nothing. For the method, see changeover time.

Winder set changes and roll changes

On many machines the winder has little spare capacity, so a slow set change backs up the reel. Each set change means cutting the web, ejecting the finished rolls, loading new cores and starting the web on them. When the width pattern changes, the slitter knives move too, on most modern winders automatically. Each parent reel change adds a splice or a new threading.

The winder PLC knows its run state and usually counts sets. What it does not show is why one set change took three times as long as the others, or why a parent reel change dragged. Opening the video for those minutes shows whether the crew waited for cores, fought the knives or was pulled to another job.

Waiting for cores or wrapping material

A winder cannot start a set without cores from the core cutter. A roll wrapper cannot run without wrapping material, headers and labels. A sheeter line stops when the ream wrapper runs out of wrap.

Give "waiting for cores" and "waiting for wrapping material" their own stop codes, apart from breakdowns. Without them, those minutes hide as "other".

Sheeters and short stops at the ream wrapper

A sheeter cuts from one or more unwind rolls into sheets, counts them into reams, and passes them to a ream wrapper, then to boxing and the palletizer. Newer sheeters give a good count. Many ream wrappers, boxing stations and older lines do not.

The ream wrapper is where the short stops gather: a torn wrap, a ream out of square, a label jam. A 40-second stop rarely gets written down. Forty-five of them are half an hour. For how to see them, read micro-stops.

Roll wrapping, labelling and palletizing

Finished rolls go over a roll handling line: weighing, wrapping, end headers, labels, then storage or the dock. In board mills, sheeted board and narrow rolls go on pallets. Jams on roll conveyors and at the wrapper back up the winder.

Paper and board mills track customer rolls by ID and weight from the winder through wrapping, because that is how they invoice and ship. Use that count. A camera adds the video when the wrap line jams or waits, and a count at pallet stacking. For palletizer stops, see palletizer downtime and cameras.

In market pulp mills, the bale line weighs and counts each bale. Use that count; the video helps where wrapping, wire tying or the unitizer stalls.

Rewinders and manual stations

Rewinders repair rolls, take out defects flagged by web inspection, or cut special widths. Small orders are often packed by hand. These stations seldom have a usable count, and that is where a camera earns its place most clearly. See OEE at a manual packing station.

Dust, humidity and moving rolls

Machine halls are hot and humid. Finishing halls are full of paper dust, and rolls of several tonnes move on clamp trucks and conveyors.

So keep OEE cameras at the winder end and in the finishing hall, outside guarding and out of roll paths, in a housing that suits the heat and dust. Agree each position with safety before anyone drills.

Where a camera goes in a paper mill

Camera, sensor or operator: station by station

This is typical for a paper or board mill, not a rule. Check each machine.

The card below shows where a camera pays off.

Bring your station list and one week of finishing stop sheets to a demo, and we will go through it station by station.

Worked example: one shift on a sheeter line

These are example numbers, and they describe no real mill. A sheeter and ream wrapping line with an ideal rate of 12 reams a minute runs one 480-minute shift.

The sheeter PLC gives the run state and counts the reams cut. A camera at the ream wrapper outfeed counts the good wrapped reams. Damaged reams pulled off by hand make up the difference.

Stops took 120 minutes: unwind roll changes 35, one size change 30, wrapper short stops 30 and waiting for wrap 25. Run time is 360 of 480 minutes, so availability is 75%.

At 12 reams a minute, 360 minutes could make 4,320 reams. The sheeter counted 3,888, so performance is 90%. The gap is 36 minutes of slow running.

The camera counted 3,828 good reams at the wrapper. That leaves 60 damaged reams, so quality is 98.5%. Those 60 reams are 5 minutes of line time.

OEE is 75% x 90% x 98.5% = 66.5%. Check it the short way: 3,828 good reams of 5,760 possible is also 66.5%.

Look at the two stops a stop sheet hides. Wrapper short stops and waits for wrap add up to 55 minutes, more than the size change. On a paper stop sheet, the first shows as a few words and the second as nothing. With their own codes and the video for those minutes, both get a real fix.

Eight checks for any paper mill camera or OEE vendor

Run these with every vendor, and with us. Bring one real shift from last week as the test case.

Before you roll out across the mill, test on one finishing line first. See the guide to a computer vision OEE pilot. If you are comparing full platforms for the industry, see OEE software for pulp and paper.

Cameras, privacy and the works council

Finishing halls have people at winders, wrappers and packing tables, and a camera there will see some of them. Tell staff before any camera goes up. In many European countries, talk to the works council first.

Frame the camera on the rolls, the reams or the pallet, not the crew. Report by line and shift, not by person. Ask each vendor, us included, what privacy masking is live today and what is still roadmap.

Fabrico's camera add-on counts product, not people. For a fuller checklist, read production line cameras without surveillance.

Where Fabrico fits

Fabrico is a cloud OEE and light MES platform. Here is what it does in a paper mill today.

• Stops and counts: from the machine signal, through a PLC, a sensor or a counter.
• Stop reasons: the operator adds them at the line, on a tablet or phone.
• OEE and losses: OEE, downtime and losses by line and shift, with losses shown in money. On the web, iOS and Android.
• Cameras, an add-on on request: the camera add-on counts output, including at ream wrappers, rewinders, pallet stacking, hand packing and machines with no usable signal. You can open the camera video for any moment on the shift timeline. In the standard setup, video is streamed on request, not stored in Fabrico.
• Your data: it leaves through a REST API, webhooks and Excel or CSV export.

Roadmap, not live today: stops detected by the camera, jam zones on the video, and a camera suggesting a stop reason.

What Fabrico does not do: web inspection or quality control of the sheet. Holes, spots, basis weight, moisture and caliper stay with your web inspection system and QCS. Fabrico does not run the paper machine or replace the DCS. For planning and scheduling, ask us in the demo.

For the full product, see Fabrico computer vision for OEE. If you are still comparing platforms, read the guide to OEE software.

Bring one shift's stop sheet from the finishing hall to a demo, and ask us to show which numbers we can fill and which we cannot.

What people ask next

Can a camera find holes and spots in the paper web?

Yes, but that is a web inspection system, not an OEE camera. Holes, spots, streaks and wrinkles are found by web inspection on the paper machine, and basis weight, moisture and caliper by the QCS. Fabrico does neither. Rolls that are downgraded or rejected can feed the quality part of OEE through a count or signal.

Does the paper machine need a camera for OEE?

Rarely. The DCS already knows the machine state, the speed and when the web breaks, and the QCS knows when a grade is in spec. Those are the better source. Read those first, and put cameras in finishing, where the counts are weak.

Can a camera count web breaks?

There is no need. The DCS already records web breaks and the time until the sheet is back on the reel, so count breaks from there. Many machines also have break monitoring cameras that show what led up to a break. Those belong to the machine's own systems, and Fabrico's camera add-on does not replace them.

Which station in a paper mill should get the first camera?

Usually the one with the weakest count: an old ream wrapper, pallet stacking of sheeted board, a rewinder used for repairs, or hand packing of special sizes. The paper machine and newer winders come last.

Is the camera video stored?

Not in Fabrico. With the camera add-on, in the standard setup, video is streamed on request, and you can open it for any moment on the shift timeline. Ask every vendor the same question, and where their video lives.

What drives the cost of computer vision in a paper mill?

Pricing is set per quote. The drivers are the number of finishing lines and cameras, mounting in a dusty hall with moving rolls, the network to the finishing hall, and training. Give each vendor the same station list so the quotes compare.

Want to see it on a line like yours? Book a demo and bring one shift from a finishing line.