Dandy marks

1. Remove any pitch or dirt on dandy that will usually make a mark in sheet.
2. Check for damaged or defective dandy and replace if necessary.
3. Clean dandy thoroughly of any stock lumps or foreign material inside dandy.
4. Check shower application and clean blocked shower nozzles.
5. Adjust dandy so that area of contact is the same from the front to the back on the forming fabric.
6. If sheet is too dry under dandy causing dandy to pick:
— raise the slice.
— put more water into sheet.
— reduce vacuum on wet boxes.
7. If sheet is too wet under dandy, causing crushing:
— lower the slice.
— reduce amount of water in sheet.
— increase vacuum on wet boxes.
8. For dandy seam mark.
— check for a filled or defective seam.
— check stock condition as it might be too slow.
9. Check dandy set-up.
— correct both alignment and height.
See also Crushing, dandy roll.