19
2.
Coarse level the laser.
Power on the laser and use the speed control knob on the control panel slow the scanner spin until you
can see the laser beam pass over the target (the farther away the target is located, the slower the
scanner must spin). Turn the light switch for the bubble level vials ON. Using the adjustment knobs
and observing the position of the precision level vials, coarse-level the laser so that the laser plane is
approximately parallel to the surface.
3.
Position and secure the target.
Place the target in the
Near Position
(see Figure 12). Move the target in its magnetic base until the
laser beam roughly hits the mid-position of the target and turn the lever on the magnetic base to ON
to lock it securely to the metal surface.
Note: As you move the target to the Near Position, Far Position A and Far Position B, mark where
the base of the target sits on the surface so that it may be repositioned in the same place each time.
4.
Set the readout.
If you are using the A-1519 or A-1520 Wireless Targets with the R-1309 system or with Hamar
Laser’s alignment programs, set the readout display through the software.
You may also need to adjust
the sampling rate to dampen the effects of atmospheric turbulence in the Read15 software (or in the Hamar
Laser alignment program you are using).
Performing the Three Point Buck-In
1.
Center the target in the Near Position.
With the target in the Near Position, zero the target.
2.
Move the target to Far Position A and tilt the laser beam until the readout reads zero.
With the target in Far Position A, tilt the laser beam with the
laser
adjustment knobs until the readout
reads zero. Be sure to use
only
the adjustment knobs that face the target (in the setup displayed in
Figure 12, this would be the adjustment knob marked ROLL).
Note: When the target is in the Near Position, always use the appropriate zero function to center the
target photocell. When the target is in the Far Position, always use the laser adjustment knobs to tilt
the laser beam. This is easily remembered by the phrase, “Center Near, Tilt Far.”
3.
Repeat Steps 1 and 2 until the readout reads zero with no adjustments.
Continue to move the target between the Near Position and Far Position A, zeroing the target at the
Near Position and tilting the laser beam using the adjustment knobs at the Far Position until the
readout reads zero without adjustments.
4.
Move the target to Far Position B and tilt the laser until the readout reads zero.
Be sure to use only the laser adjustment knobs that face the target when tilting the laser beam (in the
setup displayed in Figure 12, this would be the PITCH adjustment).
5.
Recheck the readings at the Near Position and at Far Positions A and B and adjust to zero if
necessary.
When all readings are zero
without adjustment
, the laser plane is parallel to the surface.
