HAMAR LASER STEALTH Series, Общее руководство по обучению

Страница: 29 / 113

25
If the calculated Set Point exceeds the linear range of the target, (for example, the A-1519 target has a
range of 1.0 in. or 25 mm) then the target must be moved by the Set Point amount. New measurements
must then be retaken for both targets, and a new Set Point calculated. Figure 16 shows how to move the
laser depending upon the sign of the calculated set point.
Note: If the laser is mounted on an L-106A screw lift stand, each full turn of the knob lifts or lowers the
stand .125 in. or 3 mm).
The target should give the same reading, both number and sign, at the near and far point positions. If not,
recalculate the Set Point 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). Once the laser beam is parallel to but offset from the target centerline,
you can then zero the reading on the near target position.
Three-Point Buck-In (Flatness)
The 3-Point Buck-In procedure requires adjusting the laser plane to be parallel to three points on the
surface being measured; for example, a tabletop, a surface plate, or a way surface. Any three points on a
surface may be used, however Hamar Laser recommends the setup illustrated in Figure 17.
Figure 17 – 3-Point Buck-in Using One Target (recommended setup)
When performing this procedure, it is best to place the laser source in a position that is as close to the
Near Target Position as possible. The Far Target Position B (3) should be approximately 90° to these two
points. This is not always possible, but this is the easiest configuration for this procedure.