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VIBXPER
T II Balancing 12.2019
Diagnosis
Before beginning the balancing procedure, first make sure that the
cause for the adversely affected smooth running of the rotors is actu-
ally an imbalance. Furthermore, a vibration diagnosis indicates which
balancing method is the most suitable.
A series of coordinated measurement tasks are available for the diag-
nosis of an imbalance:
• Click on "Balancing" in the start screen and open the 'Diagnosis'
tab (see below):
Overall value - vibration velocity
Records the broadband vibration of the machine in order to docu-
ment the actual condition before and after balancing. This also makes
it possible to determine the measurement location with the highest
vibration values where the sensors should be mounted.
RPM
Measures the rotor RPM. If a machine setup is used for balancing, this
parameter is required in order to calculate the resulting centrifugal
forces.
Phase measurement - one / two planes
Records the amplitude and phase angle of the RPM-synchronous vi-
bration signal. This allows, for example, the type of imbalance (static
/ dynamic) to be determined.
Spectrum & Time waveform - vibration velocity
Measures the FFT spectrum and time waveform. If the 1st harmonic
dominates the spectrum, an imbalance is probably the cause for the
poor running.
Introduction
Left:
Diagnosis measurement
Right:
FFT spectrum for diagnosis
1st RPM harmonic
vibration dominates -> imbalance
'1st Harmonic'
