: Describes how different parts of the machine move relative to each other, which is critical for distinguishing between unbalance and misalignment. : Quick tips on severity or secondary symptoms to look for. Standard Diagnostic Patterns Fault Type Frequency Signature Phase Characteristics Mass Unbalance High peak at Constant and steady Angular Misalignment , sometimes 180 raised to the composed with power phase shift across coupling Mechanical Looseness Multiple harmonics ( Unsteady or fluctuating phase Bearing Defects High-frequency "nonsynchronous" peaks Often involves amplitude modulation How to Use the Chart Effectively Identify Running Speed (
Without the chart, an inexperienced analyst might misdiagnose as looseness and overtighten bolts, wasting time and missing the real cause. Vibration Analysis Wall Chart Pdf