HAMAR LASER STEALTH Series, General Training Manual

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If the calculated Set Point exceeds the linear range of the target, (.1 in. or 2.5mm) the laser unit itself
must be moved by the Set Point amount. New measurements must then be taken for both targets and a
new set point calculated. Figure 54 shows how to move the laser depending upon the sign of the
calculated Set Point.
Note: If the laser is mounted on an L-104A screw lift stand, each full turn of the knob lifts or lowers the stand .125
in. or 3 mm).
Once the laser beam is parallel to but offset
from the target centerline, center the beam on
the near target. The targets should give the
same reading, both number and sign, for both
axes (horizontal and vertical). If not, refigure
the set and buck in again. In most cases,
remote buck-in can be accomplished in two
or three passes. This method will work even
when L1 is much greater than L2, or when
the beam does not even hit the target (in such
cases the far reading can be taken by using a
ruler to measure the beam's distance from the
target center).
The determining factor for which method to
use can be summed up as follows:
• Use Close Buck-in if the distance from
the laser to the first target is less than
one-tenth of the distance between the two
targets.
• Use Remote Buck-in if the distance from
the laser to the first target is more than
one-tenth of the distance between the two
targets, or if close buck-in method is not
effective.
When using close buck-in, the rule is: Zero
Near, Point Far . Zero on the near target, and
then point to the far target by adjusting the laser unit. Repeat until both targets provide the same readings.
When using remote buck-in, the rule is: Point Through Zero to Set Point . Center to zero on the near
target, determine the Set Point (making sure the sign is correct), adjust the laser unit to point to the Set
Point (rather than zero) on the far target, and then center the beam again on the near target. Repeat if
necessary, until both targets give the same readings. The laser beam is now bucked-in to the centerline as
defined by the two targets.
Figure 54 - Moving the laser when the
Set Point is out of range of the target cell