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Xracer

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Reply with quote  #1 
Just wondering if other flat magnet users, if the plating is wearing faster than expected..

Here is an example of one..

DSCN5793.JPG 

MarkL

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Reply with quote  #2 
Just an aside, I've always used a 2 rail unit as that is what I was shown, is the quality in readings that noticeable? I don't have one to make the comparison, but I notice on some gearboxes I monitor that I seem to get haystack at some points in higher frequency almost like an excited resonance in the gearbox.


Sorry for hijacking the thread, it jogged my memory -)
Noknroll

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Reply with quote  #3 
Xracer, yes I have one similar as far as the peeling goes but not worn through to the copper base like yours, I've been using mine for a little over a year and it was used when i got it
Sinski

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Reply with quote  #4 
Quote:
Originally Posted by Xracer
Just wondering if other flat magnet users, if the plating is wearing faster than expected..

Here is an example of one..

DSCN5793.JPG 

How old is the magnet? I have one that looks similar to that one that looks good after a couple of years of heavy use on paper machines and does not look worn like that. The other one I have is much older (probably about 6 years old) and is not worn either. Is it causing issues with the vibration data you are collecting or the performance of the magnet? 
Sinski

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Reply with quote  #5 
Quote:
Originally Posted by MarkL
Just an aside, I've always used a 2 rail unit as that is what I was shown, is the quality in readings that noticeable? I don't have one to make the comparison, but I notice on some gearboxes I monitor that I seem to get haystack at some points in higher frequency almost like an excited resonance in the gearbox. Sorry for hijacking the thread, it jogged my memory -)

I have been using flat magnets for quite a long time. I had used 2 rail magnets in the very early days when I was first exposed to vibration analysis. Not sure of any differences I have noticed but was a long time ago so not sure what a comparison of data would look like. From what I do remember though I have found that the flat magnets are easier to use with a good pull strength. 

You might want to purchase one (I know they can be expensive) and trial it out compared to the 2 rail magnets on different machines you monitor and see what differences there are.

Remember a flat magnet has a better mounted resonance than a 2 rail magnet as per the graph below.

Image result for vibration sensor mounting resonance
OLi

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Reply with quote  #6 
Yes I always use flat magnets since many years. Yes I have worn magnets and some get worse when surface is hot.
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Good Vibrations since early 1950's, first patented vibrometer 1956 in the US.
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Xracer

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Reply with quote  #7 
Quote:
Originally Posted by Sinski

How old is the magnet? I have one that looks similar to that one that looks good after a couple of years of heavy use on paper machines and does not look worn like that. The other one I have is much older (probably about 6 years old) and is not worn either. Is it causing issues with the vibration data you are collecting or the performance of the magnet? 


This one was 3 months old..
OLi

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Reply with quote  #8 
You work to hard. ;-)
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