l
Measure the vibration velocity and record an FFT spectrum if the measured values
are too high (see DIN ISO 10816-3). If high vibration signals appear at the rota-
tional frequency, there is an imbalance that must be corrected.
l
Save the measured values to be able to compare them with the values measured
after the balancing procedure.
l
Attach a reference mark on the shaft for the trigger sensor while the machine is at a
standstill.
l
Mount the laser trigger sensor with the related bracket on the machine.
l
Connect the vibration sensors to VIBXPERT 3.
Note:1. The balancing RPM and the operation RPM must lie as close as possible. If
this is not possible due to high vibration values, start at a lower RPM and approach
the operation RPM step-by-step in several balancing runs. Minimum balancing
RPM is 30 cpm ( 0.5 Hz).
2. Monitor potential resonance points. If not sure, perform a coast down.
3. The RPM must remain constant during a balancing run. If not, the balancing run
must be started again.
4. During measure, the rotor must get to operation temperature. For example, if
the rotor works in a hot air stream.
5. Frequently, static imbalance is dominant at vibration values above 10 mm/s.
First, use 1-plane balancing to compensate for this, then continue with 2-plane
balancing.
6. Make sure all necessary measure components are correctly installed before the
initial balancing run is started.
102 Version:1.0
On-board help
To Next Page
