Emerson 2130 RBM Consultant Pro, Reference Manual

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3-56 Horizontal Alignment
Entering Thermal Growth Information
Thermal growth can cause a machine alignment to change significantly as
machines are started from a “cold” position and run up to operating speed (“hot”
position). The Thermal Growth screens allow you to enter the amount of thermal
growth both machines experience during operation. The Thermal Growth
screens are reached by pressing the Enter key on the Enter Dimensions screen (if
thermal growth is enabled on the Alt Main screen). Refer to the Job Flow section
on page 3-42 for more information about enabling the Thermal Growth option.
This option is not available when Quick Spec mode is activated. Refer to the Quick
Spec section on page 3-53 for more information.
Refer to the Alignment Application Notes section on page A-3 for more informa-
tion about thermal growth.
Note
The larger PSD on the Model 8225 is capable of handling larger
amounts of thermal growth than the smaller PSD on the Model 8215.
The Laser Align program allows you to input the amount of thermal growth at the
machine feet, or at the machine profile positions (which are then converted to the
corresponding movement at the machine feet). It also consists of the following
three methods of converting from target thermal growth alignment numbers (usu-
ally provided by the Equipment Manufacturer) to estimated machine thermal
growth movements at each foot:
• Gap/Offset
• Face/Rim
• Reverse Dial
Note
The information entered for these conversion methods is only stored
with the job as long as it resides in the analyzer. When one of these
jobs is reloaded into the analyzer from the PC only the vertical and
horizontal thermal growth calculated at each machine foot is stored
and recalled with the job when it is activated. In this case, the Thermal
Growth method defined for the job is set to Growth at Feet.