You can enter 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). The following are the methods of converting from target thermal
growth alignment numbers (usually provided by the equipment manufacturer) to
estimated machine thermal growth movements at each foot:
• At Feet
Enter vertical and horizontal thermal growth values at each machine foot.
Thermal growth values correspond to the amount each shaft moves in the
vertical and horizontal directions directly above each foot.
• At Profile
Enter vertical and horizontal thermal growth values at a location other than at
each machine foot. Thermal growth values correspond to the amount each shaft
moves in the vertical and horizontal directions at each profile location.
• Gap/Offset
Enter vertical and horizontal thermal growth values using the target gap and
offset readings at the coupling. Target gap and offset readings are then used to
calculate vertical and horizontal thermal growth at each machine foot.
This is the most common conversion method for specifying thermal growth
targets.
• Face/Rim
Enter vertical and horizontal thermal growth values using the target face and rim
dial indicator readings. Target face and rim dial indicator readings are then used
to calculate vertical and horizontal thermal growth at each machine foot.
• Reverse Dial
Enter vertical and horizontal thermal growth values using the target reverse dial
indicator readings. Target reverse dial indicator readings are then used to
calculate vertical and horizontal thermal growth at each machine foot.
7.4.9 Set the tolerance type
Setting the tolerance type is available only for horizontal alignment jobs.
Tolerance is the maximum permissible deviation from a specified alignment position,
defining the limits of offset at the coupling center and angularity.
Procedure
1.
Activate a horizontal alignment job.
2. From the Laser Align Application main menu, press ALT > F6 Tolerance Type.
The tolerance type changes between Jackshaft and Standard.
Standard tolerance is a combination of offset and angle tolerances. This tolerance
type is a direct indication of the alignment condition. Optimum alignment occurs
when offset and angular misalignments are zero.
Advanced Laser Alignment
MHM-97432 Rev 7 193
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