Tips Archives - Zenco https://zencovibrations.com/category/tips/ Vibration Experts Thu, 13 Oct 2016 02:49:22 +0000 en-US hourly 1 https://wordpress.org/?v=7.1.2 https://zencovibrations.com/wp-content/uploads/2014/11/ZencoLogo-blue-Z-print-546943d7_site_icon-32x32.png Tips Archives - Zenco https://zencovibrations.com/category/tips/ 32 32 Rotor unbalance https://zencovibrations.com/rotor-unbalance/ Fri, 13 Feb 2015 03:56:03 +0000 https://zencovibrations.com/?p=362 Rotor Unbalance Rotor unbalance causes premature damage to  bearings and seals and greatly reduces the mean time between failures (MTBF) of machines. The vibration from rotor unbalance can cause false brinelling in standby machines and can reduce product quality. Vibration analysis can be used to detect rotor unbalance (or imbalance if you prefer) and most…
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]]> Machine vibration test guide – free download https://zencovibrations.com/machine-vibration-test-guide-free-download/ Sun, 01 Feb 2015 19:29:51 +0000 https://zencovibrations.com/?p=314 Download a free vibration test guide here. When setting up or managing a vibration monitoring program or condition monitoring program, it is important to document information about the machine and create a vibration test guide. (Audit it. Improve it! Getting the most from your vibration monitoring program. Buy it here) Here are the important things…
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]]> Log Linear or dB Scales? https://zencovibrations.com/log-linear-or-db-scales/ Tue, 27 Jan 2015 23:00:58 +0000 https://zencovibrations.com/?p=306 Log linear or dB scales? Log linear or dB scales? Which should you use? Log and dB scales better for analyzing vibration velocity spectra. Here’s why: Log or dB scales allow you to see small amplitude peaks in the presence of large amplitude peaks. The small amplitude peaks may be your rolling element bearing defects…
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]]> Detecting bearing defects using vibration analysis – video https://zencovibrations.com/detecting-bearing-defects-using-vibration-analysis-video/ Mon, 17 Nov 2014 01:00:32 +0000 http://zencovibrations.com/?p=152 Detecting bearing defects using vibration analysis Alan Friedman describes the detection of bearing defects using vibration analysis from the time waveform, the vibration spectrum and amplitude demodulation.  This video is appropriate for anyone interested in machinery vibration analysis who wants to know about detecting bearing defects using vibration analysis. Bearing defects generate pulsations each time…
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]]> Tip: Creating baselines and alarms https://zencovibrations.com/tip-creating-baselines-and-alarms/ Fri, 22 Nov 2013 09:52:28 +0000 http://zencovibrations.com/?p=65 Creating baselines and alarms The best alarm limit or baseline is created from data from the machine itself tested under a predetermined set of conditions including a set load, run speed, test setups and test points.  If one keeps test conditions and test procedures constant over time then one can trend data to determine if…
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]]> Tip: Create Case Histories https://zencovibrations.com/tip-create-case-histories/ Fri, 22 Nov 2013 09:48:14 +0000 http://zencovibrations.com/?p=63 When using a condition monitoring technology to diagnose faults in machines or other plant assets, it is important to create case histories of each diagnosis, whether it was correct or not. If one uses vibration analysis for example, to detect rolling element bearing wear in a machine, and if this data is trended until a…
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]]> Tip: Create a program flow chart https://zencovibrations.com/tip-create-a-program-flow-chart/ Fri, 22 Nov 2013 09:43:32 +0000 http://zencovibrations.com/?p=59 There is a difference between using a predictive technology for troubleshooting and using it in the context of a condition based maintenance program. In the latter, it is extremely important to define and standardize test procedures in order to insure that the machines are always tested in exactly the same way year after year. This…
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]]> Tip: Change test frequency based on condition https://zencovibrations.com/tip-change-test-frequency-based-on-condition/ Fri, 22 Nov 2013 09:41:40 +0000 http://zencovibrations.com/?p=57 Condition monitoring is a process of using a technology to detect changes in machine health over time in order to make a prognosis about when the machine will likely fail and to plan repairs or overhaul before that point. The frequency with which one takes measurements will depend on the machine, its current condition, and…
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]]> Tip: Performing a bump test https://zencovibrations.com/tip-performing-a-bump-test/ Fri, 22 Nov 2013 09:39:55 +0000 http://zencovibrations.com/?p=55 A bump test is used as a quick and easy method to look for natural frequencies (related to resonance) in a structure. A bump test is conducted by hitting the structure with a moderately soft object like a 2×4 in order to make it ring in the same way one would hit a bell to…
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]]> Tip: “As-found” condition https://zencovibrations.com/tip-as-found-condition/ Fri, 22 Nov 2013 09:37:36 +0000 http://zencovibrations.com/?p=53 In condition monitoring programs, a technology will be employed to detect a problem with a machine or asset and a repair or overhaul may be conducted based on that information. Unfortunately, the overhaul is often conducted by another individual in the plant and the reliability engineer may never find out if his or her repair…
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