motor vib. diagnosis

1

MOTOR VIBRATION DIAGNOSTIC CHART PROBLEM SYMPTOMS COLD-NO COLDWARM SECURE PHASE LOADED LOADED POWER 1X RPM ROUGH NO CHANGE NO CHANGE DROPS SOLID SLOWL Y AIR GAP'* ., 2X LINE ROUGH INCREASES INCREASES IMMEDIATE N/A . DROP . 2X LfNE ROUGH INCREASES INCREASES IMMEDIATE N/A ,. DROP 2X LINE ROUGH INCREASES INCREASES IMMEDIATE' 'N/A " . DROP > ROTOR BAR I X WITH SMOOTH INCREASES INCREASES NO CHANGE RAPiD . OSCILLATIONS ROUGH INCREASES INCREASES IMMEDIA TE RAPID 1X WITH DROP OSCILLATIONS SHORTED 1X WITH SMOOTH INCREASES INCREASES DROPS ST ATIC SHIFT SIDEBANDS SLIGHTLY SIGNIFICANTL Y soft foot check. # Eliminate Softfoot and Airgaps first. I

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motor vibration diagnsis basic

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MOTOR VIBRATION DIAGNOSTIC CHART

PROBLEM

SYMPTOMSCOLD-NOCOLDWARMSECUREPHASELOAD

LOADEDLOADEDPOWERUNBALANCE

1X RPMROUGHNO CHANGENO CHANGEDROPSSOLID

SLOWL YSTATOR AIR GAP'*., 2X LINEROUGHINCREASESINCREASESIMMEDIATEN/A

FREQ

. DROP$OFTfQOT *

. 2X LfNEROUGHINCREASESINCREASESIMMEDIATEN/A

,FREQ

,. DROP

.L~OOSEIRON #

2X LINEROUGHINCREASESINCREASESIMMEDIATE' 'N/A" .

FREQ

DROP

ROTOR

>

ROTOR BARI X WITHSMOOTHINCREASESINCREASESNO CHANGE RAPiD

SIDEBANDS

. OSCILLATIONSECCENTRIC

ROUGHINCREASESINCREASESIMMEDIA TERAPID

ROTOR

1X WITH DROPOSCILLATIONS

SIDEBANDS SHORTED

1X WITHSMOOTHINCREASESINCREASESDROPSST ATIC SHIFT

IRON

SIDEBANDS SLIGHTLYSIGNIFICANTL Y

* Confirm usingtorsional measurementsand soft foot check.#EliminateSoftfoot andAirgaps first.

I

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