How to inspect and respond to hot roll surface damage on a Valmet OptiCalender
Surface damage on a hot calender roll shows as streaks or embossing in the paper. Stop the nip, reduce roll temperature, and inspect visually. Grinding is required for anything beyond minor marking.
~90 min7 steps
How to diagnose roll nip vibration on a Valmet OptiCalender
Nip vibration produces CD caliper bands and audible chatter. Check roll surface condition and nip load first, then measure roll roundness with a profilometer at the next outage.
~60 min7 steps
How to reduce web breaks on a Valmet OptiWin Winder
Web breaks on the winder are usually caused by edge cracks, incorrect tension, or reel defects carried from the paper machine. Check the tension profile and inspect incoming reel edges before each set.
~30 min7 steps