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trapper

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Reply with quote  #1 
I'm in the process of fixing and updating our MHM fault frequency sets. Sometimes I'm not getting the results I wanted and, rather than spend mucho time experimenting, thought someone might have something they've cribbed together or gotten from CSI.

I remember years ago, back when the CSI manuals were written on tablets [rolleyes], that they used to have a section in their training material devoted to all the fields in the fault frequency setup. Unfortunately, I left those manuals at that employer since they paid for them. Now I wish I had copied the relevant parts.

Generally work in the Detailed mode but sometimes work in Simple mode.


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Shurafa2

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Reply with quote  #2 
How about the tables in the Simplified Handbook of Vibration Analysis?

Regards- Ali M. Al-Shurafa
trapper

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Reply with quote  #3 
Ali, I think I wasn't clear what I was looking for. This is an example of the detailed fault frequency screen in MHM.

Fault Freq Setup Table.jpg 
The first and second modifier fields can affect such things as the fundamental frequency, how many harmonics, etc. depending on the input type.

The input type includes such things as bearings, belts, gears, fixed frequencies.

CSI used to have section in their training manuals that explained all these fields.

Sorry if I confused anyone.



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Vibe-Rater

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Reply with quote  #4 
Trapper, it should all still be there. Just hit help and the great thing about CSI it takes you straight to the relevant area in the manual.  Try doing that with windows. I prefer simple mode but yes detailed mode has multipliers that really can confuse. Nok had one of those a while back.  It's clever in that the multipliers allows bearings to appear at other shafts. I prefer to EXclude rpm and 2x line frequency.  people learn that sort of stuff on day 3. So rather than unnecessarily consuming line entries I just have bearing details. BTW you have 3 different bearing sizes there. Very small at that.  A small motor would have a 63 and a 62. That's it.  Maybe that is why you are fixing things.
Vibe-Rater

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Reply with quote  #5 
And the new vibration analysis tab. Still does not display fault frequencies only. like plot data does. And you have to click 20 x to make all of it appear. I must be missing something. rgds
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