HAMAR LASER STEALTH Series, General Training Manual

Page: 78 / 113

74
The readout always shows the displacement
between the Target Center and the Laser Beam
Center. When the Target Center is not on the
True Bore Center, the numbers and the signs
on the readout will change when the target is
rotated because the Target Center is moved to
a different location in relationship to the laser
beam.
Figure 27 represents the target in the NORMal
position, with the cable down . If each square
represents .001 in., the Target Center is .002
in. higher than the Laser Beam Center (+.002
in.) and is .007 in. to the right of the Laser
Beam Center (+.007 in.).
Figure 27 – Target in the NORMal position
Figure 28 represents the target in the INverted
position, with the cable
up
. When the target is
rotated, the
signs
on the readout are also rotated.
Therefore, although the Target Center appears
to be to the right of and lower than the Laser
Beam Center in Figure 28, the vertical readings
are positive and the horizontal readings are
negative. When the vertical TCE is calculated,
(INverted divided by 2) the Target
Center is .004 in. higher and .003 in. to the right
of the True Bore Center in the NORMal
position.
The table below shows the calculation of the
vertical and horizontal TSCE values.
Figure 28 – Target in the INverted position
NORMal Vertical Reading +.002 in. NORMal Horizontal Reading +.007 in.
INverted Vertical Reading +.008 in. INverted Horizontal Reading -.001 in.
Total +.010 in. Total +.006 in.
Divide by 2 =
Vertical TSCE +.005 in.
Divide by 2 =
Horizontal TSCE +.003 in.
If you place the Laser Beam Center exactly on the True Bore Center with the target in the NORMal
position, the readings will show Ve.005 in. and Hori.003 in.