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Troubleshooting roll defects - causes and corrective actions

Wound roll defects are described and possible causes and associated corrective actions are presented for each defect.

Press fabric monitoring explains machine operating performance

Good press felt monitoring and conditioning methods help avoid runnability and quality problems. There is no single approach - but some of the best practices are described in this article.

An introduction to troubleshooting with vibration signatures

The moment an asset is placed in service it is headed towards failure. It is the vibration analyst with tools and techniques, who helps prevent costly downtime.

Know the winder danger zones and related safety equipment

Working in the winder area involves risk to operators and maintenance personnel. Although guards and warning lights and horns help to improve safety, workers must always be aware of the risks involved in each section of the winder.

Speed increase creates suction roll bearing vibration, case study

Analysis of unusually high vibration levels from a suction roll back internal bearing pointed to a recent speed increase. Lubricant and a transducer helped.

Mill finds good housekeeping can reduce vibration, case study

PM5 was producing waves of vibration that speed limited the machine, reducing production by 10%. Vibration analysis pointed to the gearbox pinion shafts.

Coater pivot frame hysteresis analysis can solve binding problems

Most blade coater beams are fastened to pivot frames which move the head into position when the coater is loaded. In the case of rigid support profile bar coaters, if the pivot frame binds, coat weight control suffers. A hysteresis test may be needed.

Understanding coating viscosity, rheograms and rheology problems

Coating rheology is measured with low shear and high shear viscosity instruments. In coating rheology, viscosity is the measure of the resistance of a coating formulation to an imposed flow.

Valmet Field Services strive to earn your trust every day

Valmet's Field Service professionals are on a mission to earn your trust. Assisting you in moving your performance and reliability forward on a shared journey requires expertise, safety consciousness and trust.

10 tips: Resist headbox corrosion in maintenance & operation

Corrosion can be minimized by adhering to these maintenance and operating procedures.