CRL 1-hr: 9/26 Introduction to Uptime Elements Reliability Framework and Asset Management System

The main reason balancing efforts sometimes fail is because the problem is simply not due to unbalance. Balancing fixes only one problem: unbalance. Vibration from misalignment, eccentricity and other problems may be reduced in just one direction, but not by balancing.

Simply stated -- To succeed at balancing, fix problems due to misalignment, eccentricity, bad bearings, resonance, and looseness first.

• Do everything with precision.
• Check initial reading for repeatability.
• Wait for readings to stabilize before recording.
• Take notes.

Measure the vibration amplitude with precision. If amplitude readings fluctuate there may be difficulties. Average the amplitude if you can.

Measure phase with precision. Try to get phase readings to within 2°. If phase is not steady there may be problems. Average the phase readings if you can.

Weigh trial and balance weights precisely. Use a precision scale to measure weight accurately. Digital scales are best.

Position weights exactly at the angle required. Use a fixed phase reference card or phase pointer. Position all weights within 2° if you can.

Note that errors reduce your effectiveness in arriving at a solution.

• An angle error of 7.5° limits balance improvements by 15%.
• An angle error of 15° limits balance improvements by 25%.
• An angle error of 30° limits balance improvements by 50%.
• An angle error of 60° renders balance improvements to 0.

Check that balancing is progressing as it should, and use common sense in adding weights. Make certain that it is closing in on a solution and that you are not "chasing your tail".

Further considerations in the field....

• Ensure a good solid mount of the accelerometer.
• Ensure a good solid mount of the laser. Make certain that it is not moving in any fashion.
• Make certain not to store data until phase is not varying any more than 3 degrees
• Set the Fmax value to a reasonable number that is about 6-10 times the running speed.
• Set the number of averages to at least 2.

Tip provided by: Dennis Shreve, Support Engineer, Commtest, Inc.

Upcoming Events

August 8 - August 10, 2023

Maximo World 2023

View all Events
banner
80% of Reliabilityweb.com newsletter subscribers report finding something used to improve their jobs on a regular basis.
Subscribers get exclusive content. Just released...MRO Best Practices Special Report - a $399 value!
DOWNLOAD NOW
Seven Chakras of Asset Management by Terrence O'Hanlon

The seven major asset management chakras run cross-functionally from the specification and design of assets through the asset lifecycle to the decommissioning and disposal of the asset connected through technology

Reliability Leader Fluid Cleanliness Pledge

Fluid Cleanliness is a Reliability Achievement Strategy as well as an asset life extension strategy

MaximoWorld 2022 Conference Austin Texas

Connect with leading maintenance professionals, reliability leaders and asset managers from the world's best-run companies who are driving digital reinvention.

“Steel-ing” Reliability in Alabama

A joint venture between two of the world’s largest steel companies inspired innovative approaches to maintenance reliability that incorporate the tools, technology and techniques of today. This article takes you on their journey.

Three Things You Need to Know About Capital Project Prioritization

“Why do you think these two projects rank so much higher in this method than the first method?” the facilitator asked the director of reliability.

What Is Industrial Maintenance as a Service?

Industrial maintenance as a service (#imaas) transfers the digital and/or manual management of maintenance and industrial operations from machine users to machine manufacturers (OEMs), while improving it considerably.

Three Things You Need to Know About Criticality Analysis

When it comes to criticality analysis, there are three key factors must be emphasized.

Turning the Oil Tanker

This article highlights the hidden trap of performance management systems.

Optimizing Value From Physical Assets

There are ever-increasing opportunities to create new and sustainable value in asset-intensive organizations through enhanced use of technology.

Conducting Asset Criticality Assessment for Better Maintenance Strategy and Techniques

Conducting an asset criticality assessment (ACA) is the first step in maintaining the assets properly. This article addresses the best maintenance strategy for assets by using ACA techniques.