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Vibration analysis - introduction to techniques and equipment

This article provides a clear, effective and illustrated introduction to vibration analysis techniques, including principles, equipment and spectral analysis.

Troubleshooting headbox corrosion, plus an analysis case study

Imperfections in a headbox's finish interfere with fiber flow through its chambers, resulting in sheet uniformity problems and a poor end product. A process and condition test can identify problems caused by corrosion, fiber orientation and machine limitations.

Sources and solutions for several common doctoring problems

One of the main causes for doctoring problems is the loading tube, which may be kinked, leaking or incorrectly pressurized. Additionally, there are a number of failure points such as pivot brackets, pivot rods, blade wear and sequencing.

Protect costly soft roll covers with novel mechanical devices

Soft rolls represent a significant investment for mills, yet they are susceptible to damage, especially if the surface temperature varies too much across the face of the roll. This article describes the design, operation and maintenance of some of the most common soft roll protection devices.

Proper bearing lubrication and modernization are essential

Most bearing failures can be traced to two maintenance oversights: a lack of lubrication or the use of the wrong type of lubrication. An upgrade may be needed.

Apron lip mapping and repair avoid production quality problems

Apron lip damage usually comes in the form of nicks, scratches or dents. These minor abrasions can trap fibers from the pulp or cause distortions in the flow of the headbox jet, which jeopardizes sheet formation. Preparation before apron repairs can improve maintenance safety and save money.

OT cybersecurity: Move beyond monitoring to true protection

When cyber threats hit your production environment, monitoring alone isn’t enough. You need protection that stops attacks before they impact operations. Learn why intrusion prevention systems are a critical layer of OT cybersecurity, and how to best implement them.

That feeling when...vision and growth propel team success

Chetan Thakare’s story is all about innovation and dedication. Discover how he’s shaping automation solutions at Valmet.

That feeling when mechanics spark an engineering passion

Rosário Malheiro, Condition Monitoring Specialist, has paved a path marked by challenges, learning, and achievements. In this interview she shares her journey, the difficulties and rewards of a career in engineering, and offers valuable advice for those wishing to pursue this field.

Planned and unplanned downtime and its impact on tissue converters

Downtime can be a detriment for tissue converters, but it’s also necessary to keep production lines running at peak efficiency. The difference between hindrance and help is whether the downtime is unplanned or planned.