Baumer BA DenexEdgeDetectorII - Manual (Page 8)

User Manual DENEX Edge Detector II 8/20 Baumer Electric AG
Version 2013-02, V1.6 www.baumer.com Frauenfeld, Switzerland
4 SOFTWARE FUNCTIONS
The benefit with the microprocessor-based copy sensor is that the sensor learns what the
products and the stream look like and make decisions according to this.
Application Setting
Things like output pulse width, Blocking Function and other parameters are set a little
different for each application in order to reach the highest possible accuracy.
There are DIP-switches that tell the sensor which application it should be set for.
It is very important to set the right application!
4.1 Blocking Function
This function will eliminate false counts due to double edges or a cut-edge-first delivery.
The sensor will count edges coming within the blocking zone as one product. In
productions using stitches, extra pulses due to the stitch are blocked out by this function.
The blocking zone is a dynamic value that constantly adapts to the average distance
between copies. It will be 15%, 30 % or 46% of the average lap, depending on application.
The average distance between copies is 100%, see figure 4.1.
Figure 4.1 The principle of the blocking function. The blocking zone is marked with grey.
15% is dark grey, 30% both grey sections.
The 46% blocking zone is marked with arrows.
For irregular product streams where the lap distance between each copy varies much, the
above described blocking function, can block out copies. This gives the result that there
are too many copies in each bundle. For such cases a special mode is available in the
software, Mode 11.
Our general recommendation is to try to adjust the machinery and get correct stream
conditions, so the lap distance between each copy becomes equal.