User Manual

8-6 Application Information
Thermal Growth
Unfortunately, machines that must be aligned may not expand thermally at
the same rate. Because of this, you may have to intentionally misalign them
in their “cold” positions in order to achieve alignment when they are “hot”.
The following drawing shows an example of this.
Different Thermal Expansion Rate Examples
The UltraSpec alignment system allows you to input the amount of vertical
and horizontal thermal growth at each machine foot. There are several
methods that can be used to calculate this growth.
Cold machines intentionally misaligned
Machines properly aligned after reaching operating temperature
Motor
Small
Expansion
Large
Expansion
Gearbox
Chapter 8 Page 6 Friday, January 26, 2001 10:34 AM