GE Custom 8000 Instructions Manual page 10

DLCGEEP-124-I/000, Approved, 2016-11-11, CampinasDM
shim pack under any one foot should not exceed five,
because too many shims may provide a "soft" mount on
that foot. This condition could cause dynamic problems.
Drilled and tapped holes are provided in the
motor or generator feet for jacking screws as a
convenience in alignment. Note that jacking screws must
not be used for permanent support.
Angular Alignment for Flexible
Couplings
Axially separate the coupling halves to their
maximum end float. Attach a dial indicator on one
coupling hub with the indicating button positioned
against vertical, machined surface on the other coupling
hub. Attach a second dial indicator hub 180 degrees
apart. See Fig. 2. Mark the locations of the indicating
button with a visible mark.
Set the two dial indicators to zero. Then, with
each coupling a full end float, rotate the two coupling
halves in 90 degree increments. Read and record each
dial indicator at 3:00, 6:00, 9:00 and 12:00 o'clock
angular positions of the shaft. Two dial indicator setups,
180 degrees apart, are used to correct for possible, axial
shift of one shaft with respect to the other. Use the
difference in readings between the two indicators to
10 GE Industrial Control Systems GEEP-124-I
GEEP-124-I Horizontal Induction Motor
Fig 2 Arrangement of indicators for angular alignment
determine the angular misalignment between the two
coupling halves. Add or remove shims under the feet as
appropriate to correct for misalignment in the vertical
plane. A lateral, angular movement of the unit is
required to correct for misalignment in the horizontal
plane. Continue the angular alignment procedure until
the angular misalignment does not exceed 0.0015-inch.
This may require several iterations.
Copyright 1997,1998 The General Electric Company, USA
WPI, Antifriction Bearing