Machinery Balancing Module
How to Perform a Single-Plane Procedure
The Microlog automatically analyzes the data to determine if the 30/30 rule is being
met. If the Trial Run magnitude is between 70% and 130% of the Initial Run magnitude,
and the Trial Run phase is within ±30 deg of the Initial Run phase, the 30/30 rule is not
being met. In this case, the following warning appears:
The Trial Weight you have used may not provide the optimum balance
solution. Do you want to change the trial weight?
If the Trial Run magnitude is over 200% of the Initial Run magnitude, the following
warning appears:
The Trial Weight is too large and the results may be inaccurate. Do you
want to change the trial weight?
• In either case, select the Yes function button to return to the Add Trial Weight –
Plane 1 screen where you can adjust your settings. Select No to continue with the
current settings.
With the 30/30 rule satisfied, the Microlog uses differences between the reference run
readings and trial run readings to compute the influence coefficient, which it uses to
compute the permanent correction weight solution.
Performing Multiple Trial Runs (optional)
If desired, performing multiple trial runs allows the analyst to see if the machine being
balanced behaves in a linear fashion. To do so, analysts apply and remove trial weights
at different locations to see how the machine reacts, indicating which trial weight is best
to use.
To perform multiple trial runs:
• From the trial run screen, Stop the trial run.
• Press the Table button to display the job’s Summary table. When prompted
whether you will remove the trial weight, select Yes to remove the trial weight.
• In the Summary table, navigate to the previous Trial Weight item (TW), and press
the Goto function button. A message prompts whether you wish to add another
trial run, or replace the existing trail run.
SKF Microlog - GX Series 5 - 17
User Manual
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