30 Operation conditions and prestarting procedures
BALTECH VP-3470
Operation manual
Before you start measuring make sure that the tachometer catches the marks stably.
If you use the tachometer for the phase detection (during the balancing) note the
following:
Do not touch the installed tachometer till the balancing procedure is completed.
If the tachometer is moved during the balancing, all the measurements must be
carried out all over again.
5.3.1. Angular marking of the rotor
Angular rotor marking should be performed according to the defined direction
(towards/against rotation).
The angular marking is made according to the direction defined in the balancing
parameter settings (towards/against rotation).The first mark can be located at any
place. An operator can decide himself how to apply the mark on the rotor: it can be
an angular mark from 0 to 360°, or sequential numbering of blades (for example,
on a fan) or holes on the rotor coupling etc. (Figure 8).
Figure 8. Marking in the balancing plane
5.3.2. Preparation of the correction weights
Some machines (large electric motors, pumps, turbines, etc.) have special balancing
planes. Often such machines are delivered to the customer with installed correction
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