Release 7/2009 Ver. 1.0
Technical Manual: GS-120 Light Curtain Systems
TAPESWITCH CORPORATION
Phone: 631-630-0442
100 Schmitt Boulevard
23
Fax: 631-630-0454
Farmingdale, New York 11735
www.tapeswitch.com
3.2.4
OPTICAL ALIGNMENT
The emitter and receiver units should be mounted facing
each other at the same height with their axes aligned.
Misalignments, as illustrated in
Figure 19
, should be
avoided. Tapeswitch offers a laser alignment tool to add
visible assistance over longer range or when mirrors are
used. See section 4 for detailed information.
Figure 19
3.2.5
REFLECTIVE SURFACES
There should be no reflective surfaces within the ‘field of
view’ of the curtain units. Reflective surfaces within the
field of view can lead to non-detection of an obstruction.
The field of view of each of the emitter and receiver
units is approximately 5 degrees either side of the
optical axis.
A minimum distance from the optical axis to any
reflective surface must be observed. This distance
depends on the actual operating distance and must take
into account possible misalignment. This is illustrated in
Figure 20
. The distance should be determined as
follows:
Operating distance L < 3m: X < 260 mm
Operating distance L > 3m: X > 0.0874L mm
Figure 20
