Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 32)

page 32
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Installation and Alignment
EZ-SCREEN Grid
Instruction Manual
WARNING . . .
If Trip Test Indicates a
Problem
If the EZ-SCREEN Grid System
does not respond properly to the
Trip Test, do not attempt to use the
System. If this occurs, the System
cannot be relied upon to stop
dangerous machine motion when a
person or object enters the light
grid.
Serious bodily injury or death
could result.
!
1) Attach the battery-powered LAT-1 to the housing of the emitter over the location
of beam 1 (closest to the display), using the EZ-SCREEN bracket clip included
with the tool. A dot on the sensor housing next to the lens window indicates the
beam’s location. Align the hole on the LAT-1 over the beam 1 marking (see
Figure 3-12).
NOTE: To find the general direction the laser beam is pointing, place a target at arm’s
reach, look alongside the LAT-1, and slowly raise the target until the red dot
appears on it. Using this method and rotating the emitter will send the beam
in the approximate direction of the receiver. If the dot still cannot be located
at the receiver (or mirror), “walk” the target down the path of the beam, while
keeping the dot centered on the target, until the desired range is reached.
2) If no corner mirrors are used in the application, attach or hold a piece of
reflective material, such as white paper, the reflective tape included with the
LAT-1, or the optional clip-on reflective target, to the receiver at the
corresponding beam 1 location. Do not affix the self-adhesive backing of the
reflective material to the sensor windows or to the mirror surfaces; the
adhesive residue may not be easy to remove. See Figure 3-13.
If corner mirrors are used, attach or hold the reflective material to the beam 1
height in the approximate center of mirror 1.
3) The Laser Alignment Tool emits a bright red pinpoint of light along the same
path as emitter beam 1. Adjust the emitter tilt and rotation until the LAT-1
beam is centered over the receiver (or mirror) beam 1 location. Partially
tighten the emitter mounting hardware to prevent misalignment when the
LAT-1 is later removed. (If no mirrors are used, proceed to step 5. If mirrors
are used, proceed to step 4.)
4) After the emitter beam 1 is aligned on the first mirror, remove the reflective
material from that mirror and repeat the process on the second mirror. Repeat
the process for each mirror in succession, until the laser beam shines on the
reflective material positioned at receiver beam 1.
5) Position the LAT-1 on the receiver housing, centered over beam 1 (closest to
the display). Align the receiver beam 1 as described in step 3 for the emitter.
(Mirrors, if used, normally should not require realignment.) Partially tighten
the receiver mounting hardware to prevent misalignment when the LAT-1 is
removed, and remove the LAT-1.
Using the System for Alignment
Power-up the EZ-SCREEN Grid system and use the Beam Status indicators on the
receiver to align the system by rotating the emitter and receiver sensors. Do not
adjust the tilt of either sensor unless absolutely necessary to align or optimize
alignment. The system alignment is optimized when all Beam Status indicators
are steady Green.
When alignment is optimized, tighten the mounting screws and the mounting
stand base nuts, or other mounting hardware, to secure the emitter, the receiver,
and any mirrors used.
Perform the trip test (described in Section 6.2) to verify proper system operation
and to detect possible reflection problems.
Do not continue operation until the entire checkout procedure is completed
and all problems are corrected.
Figure 3-14. Alternate retroreflectors
used for alignment
When the emitter is properly aligned,
the laser beam hits the screw in the
center of the reflector and the “glow”
will dim slightly.
Red Laser
Beam
Emitter Receiver
Emitter
Receiver
BRT-THG-2-100 reflective tape,
cut to length slightly longer than the
sensor protected height
Longer reflective
tape highlights
laser beam,
even if emitter is
tipped in or out