Forming fabric, defects

Edge splitting:
1. Check for edge damage due to misalignment of machine and reset guides.
2. For excessive edge wear, improve lubrication and adjust deckle seals.
3. If vacuum box edges are dry, reset deckle seals and improve lubrication.
Holes:
1. To remove foreign materials, improve cleaning showers and check incoming stock for contaminant source.
2. If there are fabric burns, check slice lip clearance and make certain that breast roll doctor is not passing stock lumps.
3. Check distance of shower nozzles from fabric and shower water pressures.
— replace any worn nozzles.
4. Check selectifier screens for holes/breakage.
See also Holes in wire/fabric.

Inward depressions:
1. Improve showering.
— check stock for any incoming foreign objects.
2. Check for damaged outer wire return roll.
— improve shower cleaning.
3. Clean all fabric shower systems.
— replace any worn nozzles.
4. Check or install doctors on outer wire return rolls.

Ridges/creases:
1. Check machine alignment.
2. Repair or realign fabric-guiding system.
3. Check for roll damage.
— repair or re-cover roll.
4. Check roll doctors, bearings, freedom to turn, and surface condition.
5. Check for damaged ceramic segments.
— replace damaged drainage elements..
6. Check for damaged foils or vacuum boxes.
— repair or replace damaged parts.
7. Increase fabric tension.
— reduce drag load to reduce ridges.