How many revolutions of the shaft would you ideally like to see in a time waveform if the fault condition causes vibration changes multiple times per revolution?

In vibration analysis, especially when diagnosing faults that cause vibration changes multiple times per revolution, capturing enough data points is crucial for accurate analysis. Ideally, having a time waveform that represents 4-10 revolutions of the shaft provides a clear view of the recurring patterns associated with the fault condition.

When a fault leads to multiple vibration changes within a single revolution, analyzing 4-10 revolutions allows for a sufficient number of cycles to observe the variations and patterns in the waveform. This range strikes a balance between having enough data to identify faults accurately and keeping the analysis manageable without overwhelming complexity.

If the number of revolutions captured were lower than this range, essential details about the vibration characteristics might be missed. Conversely, capturing more than 10 revolutions could lead to excessive data which might complicate the analysis without providing substantial additional insight into the fault condition, especially if the fault exhibits clear repetitive patterns within that 4-10 revolution range.

Thus, striving for 4-10 revolutions ensures that the analyst can effectively observe and interpret vibrations induced by the fault condition without unnecessarily complicating the data set.