Page 169 - Rotating Machinery Pratical Solutions to Unbalance and Misalignment

Reverse Indicator Alignment
Chapter
Chapter
Chapter
Chapter
Chapter
Reverse
Reverse
Reverse
Reverse
Reverse
Indicator Alignment
Indicator Alignment
Indicator Alignment
Indicator Alignment
Indicator Alignment

INTRODUCTION

n the previous chapter, an advanced rim and face alignment
process was examined in detail. In this chapter, a double rim
I I I I I method known as the reverse indicator method will be dis-
cussed. The alignment processes will be found to be quite similar,
and there will be machines that will be more easily adapted to one
or the other methods. Both methods are capable of accuracy of less
than 1 mil.
As with any alignment process, several preliminary steps
must be performed. The stationary machine must be identified,
and the left side of the equipment designated. Next, the machine
is inspected for level, soft feet, damaged or excessive shims and
for sources of unbalance. Follow the process outlined in the rim
and face method to accomplish these inspections.
The basic difference in these two methods is the types of
readings taken. In the rim and face method, the readings were
both taken from the stationary machine to the adjustable machine.
In the reverse indicator method, one reading is taken from the
stationary machine to the adjustable machine, while the other is
taken from the adjustable machine to the stationary machine. This
is necessary, since both readings are rim readings.
As with the rim and face method, disassembly of the cou-
pling is not necessary, but a close inspection of the coupling and
its components is highly recommended. Once all inspections are
complete, the indicator fixtures should be assembled on the ma-
chine.