line scanner
raster scanner
1
2
Figure 11: Allocation of scan line(s) to bar code and conveyor direction
1
Line scanner
2
Grid scanner
5.3.2
Reading distance to the bar code and aperture angle α
The maximum distance from the viewing window of the device to the bar code may
not exceed the limit values for the device. Because of the V-shaped deflection of the
beams, the usable length of the scan line for evaluation (reading field height) depends
on the reading distance.
line scanner
raster scanner
reading distance
reading distance
1
2
3
3
Figure 12: Definition of the reading distance and the aperture angle α
1
Line scanner
2
Grid scanner
3
Reading distance
In the specification diagrams (
see "Reading field diagrams (working ranges)",
), the height of the reading field is shown as a function of the reading distance
for different resolutions (module widths).
5.3.3
Angular orientation of the device
When the scan line sweeps across the bar code at nearly a right angle, the optimal
alignment of the device has been achieved (azimuth and tilt). Possible reading angles
that may occur between the scan line and the bar code must be taken into account.
This applies to all three levels in the room.
To avoid surface reflections, select a rotation angle of approx. 15° from the perpendicu‐
lar to the bar code,
see "Avoiding surface reflections", page 34
.
MOUNTING
5
8017842/19XD/2021-11-19 | SICK
O P E R A T I N G I N S T R U C T I O N S | CLV61x DualPort (PROFINET)
33
Subject to change without notice
