Most cases of misalignment are a combination of the two above described types, and diagnosis is based on stronger 2X peaks than 1X peaks and the existence of 1X and 2X axial peaks. Take care that high axial 1X levels are not caused by imbalance in overhung rotors.
Misalignment produces a variety of symptoms on different types of machines, and the average vibration signatures for healthy machines should be consulted to determine allowable 1X and 2X levels.
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