Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 31)

page 31
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
EZ-SCREEN Grid
Instruction Manual
Installation and Alignment
Optical Alignment Procedure
After the emitter and receiver are mechanically aligned (perpendicular to the floor
along the path of the beams, and plumb in all possible directions), optically align
them, first using the LAT-1, if desired, and finally using the receiver Beam Status
indicators.
Using the LAT-1 for Alignment
The LAT-1 Laser Alignment Tool (see Section 2.2) is extremely helpful for initial
optical alignment, especially in long-range applications and when corner mirrors are
used.
The useable range of the LAT-1 (the red dot viewed at the target) depends on the
color and reflectance of the target, the level of ambient light present, and the
presence of airborne contaminants. With a 90 percent reflectance white test card,
under average lighting and with no airborne contaminants, the red dot is viewable at
approximately 150' or more. For longer ranges, the lighting should be dimmed or
retroreflective targets should be used. The optional clip-on retroreflective target
(EZA-LAT-1) can increase the target area and the visibility of the red dot created by
the laser beam (see Figure 3-14).
NOTE: The LAT-1 should only be used at the beam 1 location to align the emitter
with the receiver. Do not slide the LAT-1 along the length of either sensor;
housing twist may deflect the laser beam, resulting in misalignment. Any
twist in the housing (a normal occurrence) is compensated for within the
EZ-SCREEN optic components.
Figure 3-12. The LAT-1 Laser
Alignment Tool, in
position on beam 1 of the
emitter
Beam 1
location
mark is
visible in
center of
hole
Figure 3-13. Optical alignment using the LAT-1
Emitter
Emitter
Mirror #1
Mirror #2
Receiver
Receiver
Retroreflective
Tape