User's Manual

61
Brand of ACOEM
BALANCING MODULE CHAPTER 4.
The Balancing module
enables "in situ" balancing of a rotating machine. This means that it is possible to balance
the machine's rotor within its own bearings, without having to dismantle it completely and without resorting to a
balancing rig.
FALCON is a universal tool that can be adapted to the entire base of machines to be balanced on site, regardless
of the size and complexity of the rotors, by managing up to 4 balancing planes:
 Management of accelerometers, velocimeters, proximity probes (run-out compensation)
 Simultaneous measurements on several vibration channels (up to 4 channels) and a tachometer
 Rotation speeds ranging from 12 to 280,000 CPM (indicated in Hz or CPM)
 Management of metric and imperial units.
Simple to use, FALCON supports the operator through every task and controls the reliability of the balancing
results. The user is guided through the user-friendly visual interface, step by step, to define the machine,
automatically configure the tachometer, define the trial weights and corrective weights, and perform measurements.
The principle is to add known weights named “trial weights” to a rotor and to assess the resulting variations. This
enables the influence matrix to be assessed, as well as the complete set of coefficients characterizing the
relationships between the unbalance and the vibrations that it generates. It is then easy to calculate the unbalance
generated by the vibration measured on the instrument and, as a result, the weights that can compensate the said
unbalance.
Two cases may occur:
 You are balancing the machine for the first time, and you do not know the influence matrix yet, it is then
required to make several measurement sets (or runs) with various additional balancing weights
 You have already balanced the machine and just a single additional trim run is then required: see § 4.13
The next chapter gives a general view of different steps of the balancing operations.