Here is a plot I received from a outside contractor performing studies on one of our machines. Opinion's would be appreciated.

fs01.xls (58 Kb, 107 downloads)

What does this plot show, a startup, a coastdown or a waterfall or what?

The plot is a data acquisition at each speed shown on the right hand scale. It's from one position. The speed range is 1100m/min to 1650m/min.

Is there a resonance starting at 1200 cpm causing an increase in amplitude of rotational frequency and then decreasing at about 1400 cpm and then a new resonance starting at 1400 at a different frequency, slightly lower, than the rotational speed?

What do the numbers (2, 4, 6, 7.276) to the left of the plot mean?

Buddy; the numbers on the left are amplitudes in velocity mm/sec. The peaks are definitely some sort of resonance with a shift at 1400m/min. I'm waiting for more data to come soon.

Vibbase:
Was there any data collected in radial directions, such as X,Y? Are there any waveforms associated with the spectrums?

Rafael