Operating Instructions
Chapter
5
CLV62x Bar Code Scanner
Installation
8011965/S345/2008-04-16
©
SICK AG · Division Auto Ident · Germany · All rights reserved
37
5.3.3
Angle alignment of the bar code scanner
The bar code scanner is optimally aligned if the scanning line almost scans the lines of the
bar code in the right-hand angle (90°). Possible code positions that can occur between the
scanning line and bar code in all three levels in the room have to be taken into account.
Fig. 5-5:
Line scanner: Reading angles that occurs between the scanning line and bar code
Tab. 5-1:
Permitted reading angles between the scanning line and bar code
5.3.4
Avoiding surface reflections
If the light of the scanning line(s) vertically meets the surface of the bar code, this can result
in disruptive reflections when the bounced back light is received. To prevent this effect, the
bar code scanner must be installed in such a way that the light emitted is tilted down rela-
tive to the plumb line.
Fig. 5-6:
Avoiding surface reflection using the line scanner as an example: Angle between
emitting light and bar code (tilted away from the plumb line)
α
Azimuth angle (tilt)
β
Inclination angle (pitch)
γ
Step angle (skew)
a Reading distance
b Reading range
Angle
Threshold
Azimuth
α
(tilt)
max. 30° (resolution 0.35 mm (13.8 mil), depending on the print
image)
Inclination
β
(pitch)
max. 45° (depending on module width)
Step angle
γ
(skew)
max. 45° (depending on module width)
α
β
γ
