Gen II User Manual
10-5 – Fan/Turbine Balance Chapter 10 Revision 2.10, Apr 2020
when attempts to balance on the primary balance plane do not yield the desired
results.
10.1.1.6. Using the [] key, move to the “Balance Wt Type:” field. The balance weight
type is a description of the balance weights for this application. Use the [] key
to select from Actual, Class, or Both. Class weights are balance weights designed
specifically for use with the engine. Class weights usually have a part number for
the set and a designation for each weight in the set. Weights are fixed values for
each individually designated weight. Actual means the weights are not designed
specifically for the engine, such as standard AN washers or slug weights. The
weights are designated as units of measure (grams or ounces) in the solution
offered by the analyzer rather than a specific class weight by name.
10.1.1.7. If you selected “Class” or “Both” in the “Balance Wt Type:” field, the “Num
Class Wt Sets” field will be available. Using the [] key, move to the “Num
Class Wt Sets” field. Use the [] key to select the total number of class weight
sets available for use on this engine. If you choose a number here, be prepared to
define each class weight on a following screen.
10.1.1.8. Use the [] key to move to the “Label Detail Wts:” field. Detail weights are
those weights that are installed at the factory and cannot be removed. If these
weights occupy positions normally used for trim balancing, you may label those
occupied positions so that the balance solution will be calculated disregarding
those locations. In addition, if the engine has holes that are typically unusable for
trim balancing (e.g., bolts used to attach the spinner), this setting can define those
holes as unusable also. The choices here include “No”, “Job”, and “Setup”. With
the selection set to “Job” you have the opportunity to define these holes at the
start of each job. This selection is better suited for engines where the number of
unusable holes changes on each engine. If the detail weight holes are in fixed
locations, you can define these locations by selecting “Setup”. They would be
saved in the setup and you would not have to indicate them at the start of each
job. Storing the detail weight locations in the setup may also keep you from
having to unnecessarily define the hole layout as “Uneven” in step 10.1.4.16
below.
10.1.1.9. Use the [] key to move to the “Baln Weight Unit:” field. Use the [] key to
select “g” for grams or “oz” for ounces. You will use this unit of measurement to
define your class weight set. If using Actual Weights, this defines the units of
measure in which the balance solution will be presented.
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