VMI VIBER X5 MKIII, Instrument Manual, Page: 103 / 121

103
Number of positions (Weight distribution): With this function the instrument distributes
the balancing weight to evenly distributed positions. This eliminates the need of angle
measurements in the rotor. For example if a fan has 12 blades then number the blades from
1 to 12, and write the number 12 in the setting for Number of positions. The instrument
distributes the balancing weight to the blades nearest on each side of the correct angle.
The vector sum of these two weights is equal to the calculated balancing weight.
Trial weight in position : Here you enter the position you have placed the trial weight.
Default is position 1 which is angle 0.
Angle : Angle where the weight should be attached measured from reference mark of the
balancing plane against direction of rotation of the shaft.
Keep trial weight after run: In this case the instrument will calculate a balancing weight
that will balance both the trial weight and the original unbalance at the same time.
Why do I want to keep the trial weight in the machine?
• If the trial weight is impossible or very difficult to remove
• If I have drilled or grinded away material as a trial weight.
• If the trial weight substantially improved the balance status.
You can always step back and change this setting if the trial weight was unsuitable to keep.
If you step back to change the resulting balancing weight will automatically be recalculated
to not balance the trial weight.
By pressing (F4)-Default, the parameters will be set as default.
8.8. Balancing report
Press (MENU) key and select View report.
In this window you can see the data that will be used in the
balancing report. The Displayed data depends on the
settings you made.
You will see the:

Type of rotor

ISO Quality Grade used

Rotor mass

Service speed

Balancing speed

Initial unbalance for each plane

Residual unbalance (unbalance we have for the moment)

Permissible unbalance (allowable by the ISO standard)

initial vibrations

Final vibrations (the vibrations we have now)
NOTE! The program works for any unit for the Radius or Weight, as long as the same
units are used during the whole balancing procedure.
Figure 8-16: Balancing report