I. Confirm the Specification Before Anything Else
Suction tapes are supplied per machine type and station, and a wrong specification causes more trouble than a wrong method. Before installation, compare the following against the machine documentation and the markings on the tape being replaced:
- Width and circumference: measure the tape in service rather than relying on a model name alone, because modified units within the same model family can differ.
- Joint type: endless and jointed tapes are not interchangeable. Joint thickness and stiffness directly affect how smoothly the tape passes each roller.
- Working face direction: the textured side and the smooth side are not equivalent; fitting the tape the wrong way round weakens the uniformity of negative-pressure pickup.
- Operating conditions: workshop temperature and humidity, fan performance and the service history of the previous tape all change how a new tape should be judged.
II. Unpacking and Tape Inspection
Do not skip this step between the store and the machine.
- Look for creases, pressure marks and raised fibres. A local dent will reappear at the same position every revolution and is easily mistaken for a roller defect.
- Check that the permeability holes are free of adhesive residue and oil. Raking side-light across the surface makes blocked areas visible.
- On jointed tapes, run a hand along the seam. Flat and smooth is the requirement; lifting edges are not acceptable.
- Record the batch and delivery date, so that a pattern across several tapes can be traced later.
III. Check the Path and the Parts It Contacts
After the tape is on and before start-up, verify the whole path: the tape sits in the groove of every guide roller, the suction chamber contacts the tape back evenly, and the tensioning roller travels in the middle of its range.
The usual mistake is inspecting the tape and ignoring the rollers. A worn, gummed or stiff guide roller will keep pulling a new tape off line. Three quick actions are worth the time: clean the roller faces, turn each roller by hand to confirm free rotation, and look for grooves worn at tape width.
IV. Tensioning: Over-Tight and Loose Look Different
There is no universal tension figure. Where the machine manual gives a range, that range takes priority over any rule of thumb. In practice, work from symptoms and adjust in small steps:
| Symptom | More likely direction | What to check on site |
|---|---|---|
| Tape drifts to one side and rubs the frame | Uneven side tension or non-parallel rollers | Cleanliness and parallelism of roller faces, then trim one side slightly |
| Weight deviation increases at low speed | Slightly loose: micro-slip between tape and tobacco column | Move within the manual range towards higher tension and re-measure |
| Localised shine, edges fraying faster | Over-tight: excessive contact pressure | Return towards the lower end of the range and watch the wear rate |
| Rhythmic twitch as the seam passes a roller | Seam condition or a worn roller groove | Inspect the joint and the corresponding groove |
Adjust no more than the smallest increment the machine offers, run for a while, then re-measure. Stacking several adjustments in a row tends to hide the real cause.
V. Run-In and Records
The first one or two hours after a new tape goes on are the observation window. Log three things:
- Tracking: from the same vantage point, note how the tape edge moves relative to the guide over several minutes.
- Seam behaviour: any rhythmic noise or twitching as the joint passes.
- Cigarette weight stability: compare with the readings taken before the change.
If weight variation does not improve after a new tape, the cause usually lies elsewhere - negative pressure, tobacco delivery uniformity or the condition of the glue roller. In that situation, go back to the machine side rather than adding more tension.
Conclusion
Mounting and tensioning a suction tape comes down to five habits: match the specification, inspect the tape, check the whole path, adjust tension in small steps, and write the results down. A short log per change is more useful than remembering somebody’s “standard tension value”, because machine type, output and workshop conditions differ from plant to plant. All parameters should follow the machine manual and the technical conditions supplied with the tape.
This article’s information is sourced from the internet; data is for reference only.