Why is it crucial to establish a frequency baseline for machines during vibration analysis?

Establishing a frequency baseline for machines during vibration analysis is crucial because it serves as a reference point to monitor changes in vibration patterns over time. By collecting and analyzing vibration data at various frequencies when the machine is in normal operating condition, technicians can identify deviations from this baseline. These deviations often signal potential issues such as increased wear, misalignment, imbalance, or developing faults. Recognizing these changes early through regular monitoring allows for proactive maintenance and intervention, ultimately minimizing downtime and repair costs while extending the machine's operational lifespan.

The focus of vibration analysis is primarily on detecting these operational changes rather than cosmetic concerns, operational schedules, or energy consumption adjustments, which explains why monitoring changes is the most relevant and critical aspect in this context.