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  1. MJP80

    Increasing Vibration Peaks at 21,600 CPM

    Your fault of 21,600 is an electrical, not mechanical fault. You are finding the same fault in 2 different motors (60 HZ) and the vibration is not in the driven. Typically, 21,600 is an SCR fault or broken motor windings in a DC drive system, but you have AC. It is definitly electrically (not...

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