Leuze
electronic
Mounting
Leuze electronic
Technical Description BCL 90
73
T
N
T 35/
7-
24V
Angle adjustment of the BCL
The optimum alignment of the BCL is accomplished when the scan line scans the code bars almost
at a right angle (90°) (Figure 6.4). All read angles that are possible between the scan line and bar code
must be taken account of (Figure 6.6 and Table 6.1).
Figure 6.6: Line scanner: possible read angle between scan line and bar code
Table 6.1: Permissible read angle between scan line and bar code
Avoid surface reflections
If the light from the scan line hits the surface of the bar code at an exact right angle, the light scattered
back and received may cause disturbing reflections. To avoid this effect, the BCL has to be mounted
in such a way that the exiting light is tilted in relation to the vertical (Figure 6.7).
Figure 6.7: Avoiding surface reflections: angle between exiting light and bar code
(tilt out of the vertical)
In line scanners with oscillating mirrors, the laser beam exits at an angle of 105° from the housing
when passing through the zero position (CW=50) in oscillation operation. The device can only be
mounted with its edge flush to the transport system when the amplitudes (deflection widths) are small.
Otherwise, the device is also to be mounted at a slope of 15° to obtain symmetrical deflection ranges.
Angle
Limit value
Azimuth a (tilt)
max. 45°
Angle of slope b (pitch)
max. 45°
Rotation g (skew)
max. 45°
BCL
a
: Azimuth angle (tilt)
b
: angle of slope (pitch)
g
: rotation angle (skew)
Reading
range
Read
distance
15˚
15˚
105˚
Line scanner with oscillating mirror
Line scanner
(Top view)
(Lateral view)
15˚
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