Alignment - ABB AMA Manual

Manual for High Voltage Process Performance Motors

3.6.5.4 Alignment

28 - Installation and Alignment
Figure 3-7 Definition of misalignment
The alignment of the machine is performed according to these guidelines.
1. The machine should stand on its jacking screws
2. Rotate the rotor and check the axial end float, see Chapter 3.6.3 Rough adjustment
3. Mount the alignment equipment. If gauges are used, it is practical to adjust the dial gauge
in such way that approximately half of the scale is available in either direction. Check the
rigidity of the gauge brackets in order to eliminate the possibility of sag, see Figure 3-8
Alignment check with gauges
Figure 3-8 Alignment check with gauges
4. Measure and note readings for parallel, angular and axial misalignment in four different
positions: top, bottom, right and left, i.e. every 90°, while both shafts are turned
simultaneously. The readings are recorded
3BFP 000 063 R0101 REV D