Emerson 2130 RBM Consultant Pro, Reference Manual

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B-4 -
Note
The tolerance can be changed in UltraMgr and downloaded to the
analyzer. See “Tolerances” on page 3-193 for more information on
loading tolerances to the analyzer.
The number is evaluated by measuring the vertical angle and applying it to an old
millwright’s “rule of thumb”. It is:
FDI = 2 x Vertical Angle x Inboard to Outboard Foot Distance
Vertical angle is measured at the shafts when the hold-down bolts are loosened and
the Inboard to Outboard Distance is the distance from the front to the back feet of
the component being measured (dimensions A or E in the Machine Dimensions
screen). This value is compared to the tolerance for final evaluation for that foot.
The disadvantage of this method is that it uses only vertical movement to deter-
mine the problem feet (and the numbers are commonly mistaken for shim correc-
tion values). However,
this is the only method currently used by Prüftechnic alignment
products .