24
appropriate pitch/roll/yaw adjustment knobs on the laser base so the reading on the far target is zero. The
two steps are repeated until both targets show zero readings.
Remote Buck-In
As the distance between the laser and the near target
increases with respect to the distance between the two
targets, bucking in by the close method becomes nearly
impossible. A special Remote Buck-In Procedure has
been developed for these situations. The Remote Buck-In
uses simple geometry to make the laser beam parallel to
the centerline of the two targets, and then centers the
beam on that line. Figure 15 illustrates how the remote
method works.
Unlike normal buck-in, where the laser is pointed
to
zero
on the far target, the Remote Buck-In procedure has the
laser point (tilted)
through
zero to a point called the "Set
Point" The set distance is the offset between the parallel
laser beam and the target centerline.
The theory behind this
is as follows:
The uncorrected laser
beam, the offset parallel
beam and the set
distance form a triangle.
The uncorrected laser
beam, the target center-
line and the distance
between the far target
center and the far read-
ing form a second trian-
gle. The two triangles
have the same three
angles and are therefore
geometrically identical (see Figure 16).
A relationship between these two triangles can be stated in the formula, “The Set Point is to L1 as the far
reading is to L2.” Stated mathematically, the ratio is:
Set Point
/L1 = Far/L2
If L1, L2, and the far reading are known, the set can then be determined by the following formula:
Set Point
= -(Far reading * L1/L2)
(
Note:
This is a simplified formula for cases where the laser beam is zeroed on the near target
).
In Remote Buck-Ins, steer/tilt the laser plane
through
zero until the display reading is equal to the Set
Point. This means moving the laser until it reads the set amount on the
other side
of zero from the
starting point. In doing so, the sign of the number (negative or positive) will be reversed. Figure 16
illustrates this by taking sample readings and showing how the Set Point is derived. Notice the far reading
is a negative number and the Set Point is positive as you go "through zero," resulting in a laser beam
parallel to the target centerline but offset by the set distance.
Figure 15 –
Remote Buck-in
Figure 16 -
Calculating the Set Point
Summary of Contents for STEALTH Series
Page 1: ......
Page 69: ...65 Appendix A Equipment Drawings L 733 Precision Geometry Laser...
Page 70: ...66 L 743 Ultra Precision Geometry Laser...
Page 71: ...67 A 1519 A 1520 Universal Wireless Targets...
Page 72: ...68...
Page 73: ...69...
Page 74: ...70...
Page 75: ...71...
Page 76: ...72...
