Banner WORLD-BEAM QS30 Series - Manual (Page 7)

P/N 111384 rev. D
7
WORLD-BEAM ® QS30AF Adjustable-Field Sensor
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Installation Notes
Sensor Orientation
Some targets (those with a stepped plane facing the sensor, a boundary line, or
rounded targets) pose specific problems for sensing distances. For such applications,
see Figure 7 for suggested mounting orientation.
Figure 7. Sensor orientations for typical targets
Highly Reflective Backgrounds
Use caution when sensing mirror-like background surfaces that produce specular
reflections. False sensor response can occur if a background reflects the sensor’s light
more strongly to the near end of the detector than to its far end, resulting in a possible
false ON condition. Use of a diffusely reflective (matte) background will cure this
problem. Other possible solutions are to angle either the sensor or the background (in
any plane) so that the background does not reflect back to the sensor (see Figures 8
and 9).
For these applications, the Object Detection SET procedure is recommended.
Figure 8. Reflective background – problem
Cutoff
Distance
Reflective
Background
Sensing
Field
Cutoff
Distance
Reflective
Background
Strong
Direct
Reflection
Away From
Sensor
Sensing
Field
Core of
Emitted
Beam
Core of
Emitted
Beam
Strong
Direct
Reflection
to Near End
of Detector
Figure 9. Reflective background – solution
Cutoff
Distance
Reflective
Background
Sensing
Field
Cutoff
Distance
Reflective
Background
Strong
Direct
Reflection
Away From
Sensor
Sensing
Field
Core of
Emitted
Beam
Core of
Emitted
Beam
Strong
Direct
Reflection
to Near End
of Detector
Cookies
Orientation
Not Recommended
Recommended
Orientation