Stock skating on wire

1. Real skating is usually due to a poor distribution system.
— the only permanent remedy is to change this.
— forming board adjustments that help set the sheet sooner minimizes effect.
2. The effect of a poor distribution system is reduced if proper perforated rolls are positioned without excessive gaps between the roll and box.
— recommended gap is approximately 3 mm.
3. Skating can be minimized for machine operation (but not for paper quality) by installing low coefficient of friction vacuum boxes.
4. Improvement may be noted if a slice perforated roll with evener plates is added.
5. Steepen the jet angle.
— ensure that a small part of jet is doctored off at leading edge of forming board.
6. To minimize skating, set the sheet more quickly by increasing drainage in area right after forming board.
7. Adjusting the slice to increase the doctoring action of the forming board will remove entrained air and water from the forming fabric and improve dewatering ability.
8. Increasing headbox consistency will help prevent skating.
— formation may be adversely affected.