Baumer BA Scatec2 - Manual (Page 10)

Manual SCATEC-2 19 Baumer Electric AG
Version 2011-05 www.baumer.com Frauenfeld, Switzerland
The following diagram shows a comparison of the pulse sequences for active and inactive false pulse
suppression with an identical lap stream.
yellow edge-LED
output pulse
(pulse period: p)
dead time
(duration: t = 18% of
the average overlap a)
on
off
Running direction
time
t
p
high
low
Scatec inactive
Scatec active
high
low
Scatec inactive
Scatec active
output pulse
(pulse period: p)
dead time
(duration: t = 0)
a
Manual SCATEC-2 20 Baumer Electric AG
Version 2011-05 www.baumer.com Frauenfeld, Switzerland
9.3 Sensitivity
Because the Scatec cannot discern between a front edge (which the customer wishes to detect) and a
spot on the object similar to an edge (e.g. crests or creases in the paper, creases in a carton etc), the
sensitivity of the sensor should be adjusted to the edge thickness to be detected. This means that the
sensor should be set to a sensitivity at which it detects all leading edges without being sensitive enough
to react to edge-like spots on the object thinner than the actual edge thickness.
It is possible to choose between two different sensitivity levels with DIP switch 4.
A diagram of the sensitivity in relation to the working distance and transportation speed is shown in
Section 10.6.
9.4 Variation of the working distance
The thickness that an edge must have to be detected by the SCATEC-2 depends on the working
distance. The SCATEC-2 is most sensitive at the nominal working distance which is 40mm for the FLDK
110x1003/Sxx and 100mm for the FLDK 110x1005/Sxx and FLDK 110x1006/Sxx. The relationship
between the sensitivity and the working distance is contained in the specifications in Section 10.6.
the sensitivity of the sensor varies with the working distance