Posts tagged with: machinery diagnostics

Shock Factor and SFI

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By on November 1, 2017

For years, vibration analysts have depended upon the ISO Vibration Severity Chart for the determination of machinery health.  Typically, this chart provides a level of certainty that would allow the analyst to look at the vibration levels, and if acceptable, move onto the next machine for analysis.   Some defects are determined in the waveform […]

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Fix the Easy Things First!

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By on October 26, 2017

One of the hallmarks of a good maintenance technician is the ability to troubleshoot – not just using vibration tools, or volt meters, or laptops with Ethernet plug-ins, but the ability to troubleshoot machinery in their minds.  In other words, the ability to visualize what the problem might be. “Fix the easy things first” is […]

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Precision Alignment and Balance isn’t Important – Unless you care about budgets and the reliability of your rotating assets.

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By on August 16, 2017

I read an interesting article in the June/July 17 issue of Uptime Magazine. It was titled “The Reliability Impact Within the P-F Curve” by Randy Riddell. Randy is the Reliability Manager for the SCA Barton Mill in Alabama. I encourage you to read the full article (https://reliabilityweb.com/articles/entry/the-reliability-impact-within-the-p-f-curve). The article includes the following graphic that I […]

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TROUBLESHOOTING MOTOR UNBALANCE

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By on June 20, 2017

Electric motors are almost always well-balanced when they leave the motor manufacturer.  But occasionally, motor unbalance problems are picked up with vibration monitoring tools, such as the OneProd Hawk. Here are some easy troubleshooting methods to determine the cause of unbalance in the motor. An electric motor’s rotor, like any rotating mass, cannot become out […]

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Setting Up a Motor-Gearbox for Vibration Measurement

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By on May 25, 2017

Gearboxes are common in industry.  They are used to increase or decrease speed from the driver, provide increased torque, and change direction of power transmission.   There are two main types of commonly-used gearboxes:   GEARBOX TYPE Parallel or Standard Gearbox-one where the input and output shafts are parallel. Bevel or Right Angle Gearbox-one where […]

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Calculating Output Speed Using Pulley Diameters and Input Speed

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By on May 10, 2017

Knowing the correct shaft speed of both shafts on a belt-driven machine is important when performing machinery diagnostics. Ideally you would do this by first identifying the input and output speeds using a strobe light, photo tach or laser tach. Once you know the accurate speed of both components, use this formula to determine the […]

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Maintenance Strategies, Part Three – Predictive Maintenance

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By on February 21, 2017

Predictive Maintenance, also known as Condition Based Maintenance or affectionately known as “if it ain’t broke, don’t fix it” also has its own set of pro’s and con’s. The pro’s: Rotating equipment usually gives warning signs before failure. Vibration level or pattern changes, rise in temperature, wear detected via oil analysis, performance change, motor current […]

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So You Got Your New HAWK! Let’s Set it Up.

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By on February 15, 2017

So you received your new OneProd HAWK Supervisor or HAWK Supervisor with Balancing.  There are some steps to follow to insure your instrument is configured correctly. Nest Set-up:  You will need to make sure you are using only Microsoft Internet Explorer 8 (or higher) for the first connection and you will need to download MS […]

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Maintenance Strategies: Part Two

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By on February 1, 2017

Preventive Maintenance, also known as planned maintenance, scheduled maintenance, calendar based maintenance, historical maintenance, etc. has its own set of pro’s and con’s. The theory is machinery has a life cycle. The probability of failure increases as the machine ages so maintenance needs to be performed prior to failure to extend its life and avoid […]

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Maintenance Strategies: Part One

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By on January 4, 2017

In the current highly competitive global economy we live in, there is always a drive to get the competitive edge. One way is to develop a maintenance strategy that will improve safety, meet production goals, increase uptime, increase plant efficiency and thus increase plant profitability. There are four basic maintenance strategies: Breakdown Maintenance Preventive Maintenance […]

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MACHINERY VIBRATION PROBLEMS AND SOLUTIONS, PART 6 – RESONANCE

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By on September 15, 2016

Resonance is when a force causes an object to “resonate”, due to excitation of its natural frequency.  Think of a machine coasting down to a stop.  There are certain speeds in coasting down that excite natural frequencies of the machine components.  This is often observed in the coast down of a bench grinder.  As the […]

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VibrAlign announces the HAWK Pump Challenge

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By on September 14, 2016

VibrAlign Inc. announces the HAWK Pump Challenge.  The Challenge is designed to expose mechanics and reliability personnel to modern machinery diagnostics by applying the HAWK’s built-in automatic diagnostic software to analyze their most troublesome pump. When machinery mechanics or reliability personnel sign up for the HAWK Pump Challenge they will be contacted to set up […]

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MACHINERY VIBRATION PROBLEMS AND SOLUTIONS, PART 5, MECHANICAL LOOSENESS

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By on August 3, 2016

Mechanical looseness is a very common machine vibration diagnosis.  It is often overused-becoming a “catch all” category for undiagnosed vibration.  It can be caused by a multitude of things that may seem to have no relationship to each other, such as:   Loose bolting                                               Coupling looseness or backlash Belts Too Loose                                           Cracked welds Improper bearing […]

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Alignment and Vibration: What is the correlation?

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By on July 27, 2016

This is a subject that comes up relatively frequently with our customers and observations from the field.  The purpose of today’s blog post is to illustrate what can and often does happen.  While misalignment can and does present with easily identifiable vibration signals; often it does not.  Misalignment may be present in a machine, developing […]

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Shaft Distortion and Electric Motors

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By on July 15, 2016

Although shaft distortion due to misalignment affects more than just the electric motor, here are a few things that are a telltale signs you may have an alignment issue. In a perfectly straight shaft, the centers of each shaft cross-section from end-to-end of the shaft lie on a straight line. A shaft is bent if […]

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