MAHLE RTI Laser 4 - Manual (Page 28)

Page 28
CALIBRATION PROCEDURE
Calibration of Right & Left Toe Gauge Laser Beams (continued)
3) Level the Toe Gauge and project the laser beam
image on the rear Retro-screen. (See Figure 44)
The center of the beam image must be on 6 and
midway up the mirror. If not, alternately loosen
and tighten Allen set screws on the laser diode
retainer.
There are four Allen set screws on the laser diode
retainer. (See Figure 45) The top and bottom set
screws (D) control the vertical movement of the
beam image. The left and right screws (B) control
side-to-side movement of the beam image.
4) Check the location of the reflected laser beam
image on the Thrust Angle Scale on the Laser
Toe gauge.
With the Rear-retro Screen level, the center of the
image should be mid-way up and on 5 on the
Thrust Angle Scale.
If not, adjust the two screws (M) (See Fig. 44)
until the image is on 5 and adjust screw (L) until
the image is mid-way up on the Thrust Angle
Scale.
5) Remove the Left Toe Gauge and Left Retro-
screen. Mount the Right Toe Gauge and Right
Retro-screen and repeat steps 1 through 4.
The Retro-screen is now at a perfect 90 degree angle to the front Toe Gauge and the laser beam image
indicates zero toe on the Thrust Angle Screen.
If a problem is encountered while doing an
alignment where the laser beam will not hit the
front target, recheck this step to be sure the beam
is midway up on the mirror with the Toe gauge
level (bubble centered in Spirit Level).