Although a dial indicator would be the preferred method for
accurately determining the degree of faults like these, a strobe can often help
when the machine cannot readily be shut down. We start with the same basic Slow
Motion Study approach (are you sensing a pattern…?)
Starting with the driven shaft, by lining up the edge of the
pulley or shaft with a fixed point on some structure behind it, you can watch
for any movement of the shaft that shouldn’t be there in both the radial direction
(runout, eccentricity, bent shaft, etc.) and the axial direction (cocked
pulley, bent shaft, etc.).
This tip is provided by Scott Dow, Senior Instructor of Mobius Institute.
Come back to our blog next week to read #4 in our Top 10 Reasons Why a Strobe Light is an Analyst's Best Friend. To learn more about IMVAC and the event nearest to you, visit vibrationconference.com.
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