User's Manual

Brand of ACOEM

4.10 TRIM STEPS

The trim steps are used to iterate up to 8 additional measurements used to improve the result of the balancing.

4.10.1 Trim result

This screen shows:

 The balancing quality grade estimation.

Notes:

o To display the quality, it is necessary to have the rotor weight and radius not equal to 0.

o The quality is computed only for 1 or 2 plane balancing.

 The weights to add on the rotor to try improve the balancing quality.

4.10.2 Trim definition

The screen is initialized with the computed trim weights of the previous step.

It is necessary to input the value and angular position weight effectively installed on the rotor.

The operating mode is the same as for balancing run: see § 4.9.2.

4.10.3 Trim measurement

Once the trim weights installed, start again the machine and measure to control the vibration level.

The operating mode is the same as for free run: see § 4.7.

Go to next step to display the new balancing quality grade.

4.11 STEPS BROWSER

This screen list all the steps of the balancing process and gives access to any steps already completed. A step is

not accessible if the previous one is not done.

4.12 ONE RUN BALANCING

If a balancing has already been done on a machine, it is possible to perform a balancing procedure with only one

run.

It is important that this new run is performed under the same conditions as the initial runs, i.e.:

 The rotation mark in the same angular location on the rotor,

 The same angle origin on the rotor,

 The same rotation speed,

 The same location for sensors,

 The same type of measurement equipment,

 The same instrument setting.

In the first instance, start the machine and take a measurement for each point, using the last trim Measurement

option. The trim weight calculation can then be requested.

If this method does not provide good results, the complete balancing must be performed again. This means that the

machines’ influence matrix has changed. This can come either from changes in the conditions under which

measurements are taken, or from an internal modification of the machine (wear, suspension ageing, dismantling

and assembling with new seals or different tightening rates).