Doc.Ref.No.:mVMT/om/101
masibus
Issue No. :00
Model : VM908
Operator’s Manual VM-908 Vibration meter
Page 11 of 11
02/05/16
Balancing with VIBRATION METER (VM-908)
It is only possible to balance machines where the unbalance is the major cause of vibration.
Do not change the position of the vibration transducer after starting the balancing procedure
Balancing using this method requires only three consecutive trial runs and changing the balance status of
the rotor. Only measurement of the vibration level is needed.
Balancing will of course only reduce the vibration caused by unbalance.
A balancing round will often be a good approach and a first attempt to find the reason for increased
vibration. If the balancing attempt is not successful, the cause can be loose rotor parts etc.
If the machine speed is variable, be sure to choose the same speed during every trial run. Do not search the
speed that gives the highest vibration. Such speeds mostly show non-linear results.
Start the procedure by measuring on the bearings looking for high levels in major directions. Choose a point
that should have a good connection to a balancing plane where you can put in a weight in the machine. You
must use the same radius for the trial weights and the balancing weights.
