Wet/dry line moving

1. A moving wet or dry line may be due to variable fines and filler in the white water loop that causes fluctuations in the static head of the fan pump.
2. Check that vacuums are steady in dewatering devices.
3. Check that wire speed is not fluctuating.
4. Ensure that spouting velocity from slice is uniform.
5. Check all foil angles.
6. Check stability and operation of refiners.
7. Check furnish make-up including additives.