Where Time Domain Plots Can Be Invaluable
Obviously, time domain is a powerful tool. But what kinds of problems and situations are better analyzed with the time domain plot ?
Slow Beat Frequencies
Impacts
Transients
Rubs
Chipped / Broken Gear Teeth
Amplitude Modulation
Frequency Modulation
Slow Speed Bearing Defects
Additionally, you can gather information related to the machine condition such as:
Misalignment
Looseness
# of Teeth on a Gear
Eccentricity
Waveform Shape
Instabilities
Let's see how the time domain can be of help with some of these.