Baumer BA DenexMicro - Manual (Page 9)

User Manual DENEX MICRO 9/24 Baumer Electric AG
Version 2013-02, V1.6 www.baumer.com Frauenfeld, Switzerland
4.5 Mounting With Reference Surface
In some cases, the reflections from parts under the conveyor cannot be screened off. In
this case, the following is recommended. Let the laser hit a light, matte surface, reference
surface, like a white piece of paper or a light painted plate, at 100 mm below the sensor.
The reference surface must be smooth. If the surface is wrinkled or coarse, vibrations can
cause error pulses. Also, make sure that dust and paper pieces do not stay on the surface,
since they might create extra pulses. No extra beam stopper is needed.
The accuracy can be equally good if: no up-bent back edges are present, stream is regular
with few gaps.
Up-bended back edges can produce output pulses. This mounting is only recommended in
applications with few gaps in the stream.
Figure 4.5.1 Mounting with reference surface
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