How to become an expert in Vibration Analysis 

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That is quite complicated question. Horizontal and vertical vibrations usually gives us info about imbalance, mechanical looseness etc. Axial direction is important while looking for misalignment problems. Write us more about your troubles on revaj@adash.cz and we will try to guide you.

It could be unbalance, looseness, resonance and other problems. It is really impossible to answer to your question. You would need to perform some vibration analysis on your machine.

Thanks for your comment. We are actually preparing our educational videos in PDF. We will place them on our website once available. Stay tuned :-)

​@Jack Lu You measure it with just one sensor. From accelerometer you get acceleration in g. Then the analyzer converts acceleration into velocity in mm/s by integration.

Overall RMS velocity.

Bearing with lack of grease will of course vibrate more than greased bearing. Try to grease the bearing while measuring acceleration and see if the value decreases. If yes, then you solved your lubrication issues.

1 Revolution per minute is equal to 1/60 Hertz. Hertz is the SI base unit of frequency defined as one cycle per second.

Our vibration analyzers can be used on any rotating machinery, therefore also on marine engines. There are actually hundreds of these Vibrio M devices on all kind of vessels worldwide. Sensors should be ideally placed on bearing houses. This way you will get an info about a bearing it self and also about mechanical faults related to shaft speed. Placing the sensor on engine mounting makes sense only if you are looking for loose foot, loose anchoring bolt basically. See this video about sensor mounting: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QnHl1Le2OXA.html

@@AdashCompany thanks for your reply and for the additional video link. In our case we're more on checking the quality of the newly overhaul engine and it's alignment after installation during sea trial. Usually the engine and transmission were coupled to a shaft going to the propeller. Bearing problem is unlikely to happen since new parts were used. It's more of a workmanship check rather than predictive maintenance purposes. Usually our engine alignment was affected by the hull and vessel frame strength and the stress and strain it absorb while sailing especially on rough waters

​@@coltruiz7126 Keep in mind that bearings could have been installed incorectly. Misaligned machines are also trouble for bearings because then they are stressed by unwanted load from the shaft. Therefore don't overlook bearing monitoring... Anyway, please write to our sales / technical department. We will guide you to apporiate Adash dealer in your country who can help you to find suitable solution for you. Email: revaj@adash.cz

@@AdashCompany engine monitoring during operation will be the ship's maintenance personnel's responsibility. Thanks for the advice cand email address that you gave.

We have a distributor in Bangladesh. Find him here please: adash.com/contact-us

Not all problems vibrate.

We are not a training company sir. We are manufacturer of vibration analysis tools and software.

Look for example on LinkedIn where you can find plenty of vibration diagnosticians and you can contact them.

Please contact our sales department for futher info. Email: revaj@adash.cz

Yes, you are right. But the influence from cable vibrations is very low. We can overlook it in the field / route measurements and concentrate on this cable issue for laboratory measurements where we need really precise reading. There are another interferences in factories such as electromagnetic fields which also influences the measurement.