Cut Sheet

Sensing
Field
Cutoff
Distance
E
R2
R1
A reecve background object in this posion or moving across the sensor face
in this axis and direcon may cause a false sensor response.
Figure 7. Object Beyond Cuto - Problem
Sensing
Field
ON
OFF
DELAY DELAY
DO
SIG
LO
RANGE
E, R1, R2
A reecve background object in this posion or moving across the sensor face
in this axis is ignored.
Figure 8. Object Beyond Cuto -
Soluon
Color Sensivity
The
eects of object reecvity on cuto distance, though small, may be important for some applicaons. It is expected that at any
given cuto seng, the actual cuto distance for lower reectance targets is slightly shorter than for higher reectance targets. This
behavior is known as color sensivity.
These excess gain curves were generated using a white test card of 90% reectance. Objects with reecvity of less than 90% reect
less light back to the sensor, and thus require proporonately more excess gain in order to be sensed with the same reliability as more
reecve objects. When sensing an object of very low reecvity, it may be especially important to sense it at or near the distance of
maximum excess gain.
The percentage of deviaon indicates a change in the cuto point for either 18% gray or 6% black targets, relave to the cuto point set
for a 90% reecve white test card.
For example, the cuto point decreases 10% for a 6% reectance black target when the cuto point is adjusted for 1700 mm (67 in)
using a 90% reectance white test card. In other words, the cuto point for the black target is 1530 mm (60 in) for this seng.
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-12
200 400 600 800 1000 1200 1400 1600 1800 2000
Cutoff Setting (90% White Card)
Percent Deviation
Cutoff Point Deviation
Figure 9. Cuto Point Deviaon
250
300
200
150
100
50
0
200 400 600 800 1000 1200 1400 1600 1800 2000
Cutoff Distance (mm) with 90% White Card
Minimum Range (mm)
Minimum Range vs. Cutoff Setting*
*NOTE: Minimum range is independent of target reflectivity
Class 1
Class 2
Figure 10. Q60 Minium Range Versus Cuto Seng
6.0
4.0
2.0
0
200 400 600 800 1000 1200 1400 1600 1800 2000
Cutoff Setting (mm) with 90% White Card
Hysteresis (% of Cutoff)
Hysteresis
Figure 11. Hysteresis
Class 2 Laser 18% Gray Card
6% Black Card
Class 1 Laser 18% Gray Card
6% Black Card
Q60LAF Series Laser Adjustable-Field Sensors
P/N 114348 Rev. A www.bannerengineering.com - Tel: [phone]