Auto Sweep
This is the default alignment method.
With Auto Sweep, the laser fixtures automatically acquire data using their built-in
inclinometers while the shaft is rotated. The arc of rotation can vary from 45° to 360° (one
revolution). This method is especially useful when the 4-point measurement technique is
impractical or when inconsistencies in shaft position exist at points in the rotation.
Data readings or values are automatically acquired and stored in the laser fixtures at every
2° of rotation. In a 360° sweep, it is possible to acquire up to 180 data readings.
When Auto Sweep is selected as the laser alignment method, you must also select either
Standard or Averaging as the acquisition mode.
• The Standard mode is most often used during horizontal alignments. In this mode,
once the direction of rotation is defined by the laser fixtures, any previous data
stored is overwritten by any new data acquired at the same angular position.
• The Averaging mode allows multiple sampling of data to reduce the noise in the
data by averaging all of the acquired values. In this mode, once the direction of
rotation is defined by the laser fixtures, any previous data stored is averaged with
any new data acquired at the same angular position, once the laser or sensor has
been moved at least 20° in the reverse direction or when a full 360° sweep is
performed.
The direction of rotation is determined for each measurement. The first rotational
movement away from the starting location by more than 20° is defined as the
direction of rotation. The only data stored for that measurement is the data
collected when the laser fixtures are rotating in that direction.
Pass Mode
Pass Mode functions similar to Auto Sweep. The laser fixtures automatically acquire data
using their built-in inclinometers as the laser and sensor pass by each other. Pass Mode is
useful for performing uncoupled or non-rotational alignments.
The arc of rotation can vary from as little as 45° to a full 360° (one revolution). This method
is especially useful when the 4-point measurement technique is impractical or when
inconsistencies in shaft position exist at points in the rotation.
Manual Sweep
With Manual Sweep, the laser fixtures' built-in inclinometers are used while the shaft is
rotated, but data is manually acquired and stored in the Laser Align Application instead of
in the laser fixtures. Manual Sweep functions similar to Auto Sweep except that the laser
fixtures, or shafts, are stopped at each position and that data is manually acquired. Data
from up to 180 positions may be recorded.
The arc of rotation can vary from as little as 45° to a full 360° (one revolution). This method
is especially useful for performing uncoupled or non-rotational alignments or when too
much background vibration is present.
This is the recommended sweep method for sweeps that are less than 75°.
Advanced Laser Alignment
MHM-97432 Rev 7 189
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