Roland udk20 Manual page 16

Technical data
The data for 2 sensors apply in the so-called sequencer mode.
170
160
150
140
130
120
110
100
90
80
70
60
50
40
0
Fig. 3: System reaction time P42AGS
Double sheet thresholds above 120% reduce the performance of the system with regard to air gaps
between the sheets and increase the systems reaction time according to the diagram.
Air gaps influence the performance negatively because air has - in contrast to steel - a high
resistance to the magnetic flux. Therefore, air gaps reduce the performance of the system
considerably (see chapter "3.1 Measuring principle and conditions influencing measurement
accuray").
For reliable double sheet monitoring there should be no air gap between sheet and sensor and also
between the sheets. The most reliable double sheet recognition results, if no air gaps exists. These
aspects should be specifically observed when mounting the sensors.
The influence of air gaps are described in the following diagrams.
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ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
Double Sheet Detector R1000 series UDK20
0,5 1,0 1,5 2,0
Standard working range
Manual
2 Sensors
1 Sensor
2,5 3,0 3,5 4,0
B0048991 / Rev. 1.3
PW42AGS
150 %
120 %
Single sheet thickness
(Nominal thickness) [mm]