Of course, the #1 reason is that, with a strobe light, you can learn to do this (ok, maybe…😉)
This tip is provided by Scott Dow, Senior Instructor of Mobius Institute.
From workshops, learning sessions and case studies to the latest technologies featured in the expo, the International Machine Vibration Analysis Conference provides practical learning in the important aspects of industrial vibration analysis and complementary technologies during the three-day event.
Wednesday, August 16, 2017
Wednesday, August 9, 2017
Top 10 Reasons Why a Strobe Light is an Analyst’s Best Friend: #2 – Phase Analysis
One of the most powerful diagnostic tools we have is phase
analysis and using a strobe light is a versatile and powerful tool towards that
end. As with Frequency Confirmation, you will need a phase-capable strobe for
phase, one capable of communicating with your analyzer (and an analyzer that
supports that function, of course).
Phase with a strobe light is a exercise in recording (or
remembering – we recommend recording) visible data. You are looking at the
angular location of the key, or another mark, as you move the sensor from
location to location, often recording the results on a bubble diagram on some
rudimentary drawing you’ve made of the machine and base. Obviously, this will
not be nearly as accurate as a tach or photo-eye but unless you are balancing,
using clock face numbers is sufficient for a general phase analysis. Surveying
the diagram often reveals an anomaly that, in turn, leads you to the fault and
the solution.
This tip is provided by Scott Dow, Senior Instructor of Mobius Institute.
Come back to our blog next week to read #1 in our Top 10 Reasons Why a Strobe Light is an Analyst's Best Friend. To learn more about IMVAC and the event nearest to you, visit vibrationconference.com.
Wednesday, August 2, 2017
Top 10 Reasons Why a Strobe Light is an Analyst’s Best Friend: #3 – Frequency Confirmation
For the next two reasons, you’ll need the super duper extra
special strobe light that communicates with your data collector and does phase.
Requiring a sensor, the analyzer actually triggers the strobe light using the
vibration signal, thereby freezing whichever component is the source. This is
particularly effective on belt drives, where three separate rotational speeds
exist.
Understanding spectrum analysis means understanding that the
frequencies displayed are calculated with a margin of error. By using the
measured signal to trigger the strobe to flash, it will flash at a rate that
100% freezes the component generating that signal, removing ALL doubt as to the
source. So why would anyone rely on an assumption
when you can remove all doubt by
executing a simple test? I don’t know but I do know that I once found, only because of this test, a
fault at a frequency that was 1 cpm
different than 1x. It was, in fact, the only thing that stopped what would have
been a $30,000 mistake.
This tip is provided by Scott Dow, Senior Instructor of Mobius Institute.
Come back to our blog next week to read #2 in our Top 10 Reasons Why a Strobe Light is an Analyst's Best Friend. To learn more about IMVAC and the event nearest to you, visit vibrationconference.com.
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