Special alignment options
131
› ‘View tolerance’ – used to show the complete tolerance table for the selected
coupling type, and is active only when the system tolerance is activated
5.4.8 Thermal growth calculator
Machine conditions change from the time the machine is off line to when it is running
under normal operating conditions. Some of these changes are due to process forces
(e.g. fluid pressures, airflow). The most notable of these changes is the change in
the temperature of the machine bearings and supports. This is called the machine’s
thermal growth.
ROTALIGN Ultra iS Shaft may be used to calculate thermal growth compensation if
no other values are available. Thermal growth is calculated from the material char-
acteristics, expected temperature difference and height of the shaft centerline above
the shim plane.
Thermal growth is calculated as follows:
From machine set-up, use the navigation keys to highlight the machine whose
thermal growth requires calculating.
With the machine highlighted, press
e to access the machine properties
screen.
Press
q. The context menu appears. Use f/g to select ‘Thermal
growth’.
Press
e. The thermal growth screen appears.
Press
q. The context menu appears. Use f/g to select ‘Thermal
calculator’.
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