9 Installation
9-1 Reflective Surface Interference
17
9 Installation
9-1 Reflective Surface Interference
A reflective surface adjacent to the detection zone can deflect the optical beam and may cause an obstruction
in the zone not to be detected. (See Figure 9-2 and Figure 9-3.) The reflective surface may be part of the ma-
chine, mechanical guard or workpiece. Therefore, a minimum distance (d) must exist between the reflective ob-
ject and the center line of the F3SL detection zone. The Test Procedure (Appendix B) must be used to test for
this condition.
Figure 9-1 Correct Mounting Example with Proper Alignment
.The interruption is clearly detected. The reflective object is outside of the beam angle.
Figure 9-2 Unsafe Mounting Example
The interruption is not detected because of the reflection. The reflective object is inside the beam angle.
WARNING
Install the F3SL system so as not to be affected by the reflection from the reflective surface. Failure to do so
may cause the system undetectable, resulting in severe operator injury.
Emitter
Receiver
Approach direction
Central beam
Light beam interrupted
d
Reflective Surface
Perimeter of danger area
Interruption
a
Beam Angle, a
Operating Range, R
Emitter
Receiver
Approach direction
Central beam
Light beam interrupted
d
Reflective Surface
Perimeter of danger area
Reflection
Interruption
a
Beam Angle, a
Содержание F3SL
Страница 2: ......