Interweaving

1. This is the wandering of the slit web edges across the slit that weaves the windup rolls together.
— results from movement of the winder rolls or windup shaft.
— check fit of slides (core shaft and rider roll).
2. Can result from varying web tension due to uneven caliper or moisture.
3. A non-uniform sheet will create non-uniform nip loading that leads to interweaving.
4. Spreader bars or use of separators that keep the slit open will usually correct interweaving.
5. Non-uniform diameter cores can induce interweaving by variation in the web tension when the riding-roll pressure is applied.
6. May be due to misalignment of the unwind/winder, or acceleration-deceleration too fast for braking system.
7. Sometimes results from loss of tension during a splice or erratic tension in the sheet run.