ACOEM EVO, User Manual

Page: 51 / 104

7.3
PRE-ALIGNMENT FUNCTIONS
To obtain the best possible conditions for
shaft alignment, it is necessary to perform
some pre-alignment checks. In many cases it
is necessary to make these checks in order to
obtain precise alignment. It is often impossible
to reach the desired alignment results if you
do not make any pre-alignment checks.
Before going on site, check the following:
What are the required tolerances?
Any offsets for dynamic movements?
Are there any restrictions for mounting the
measuring system?
Is it possible to rotate the shafts?
What shim size is needed?
Before setting up the alignment system on the
machine, check the machine foundation, bolt
and shim conditions. Also check if there are
any restrictions in adjusting the machine (if
e.g., there is enough space to move the
machine).
After the visual checks have been performed,
there are some conditions that must be
considered:
•
Check that the machine has the right
temperature for alignment.
•
Take away old rusty shims (check that
you can remove shims).
•
Check coupling assembly and loosen the
coupling bolts.
•
Check soft foot conditions.
•
Mechanical looseness.
•
Check coupling and shaft run-out.
•
Pipe work strain.
•
Coarse alignment.
•
Check coupling gap (axial alignment).