Roland Double Sheet Detector R1000 Series Manual page 25

B0069991 / Rev. 1.7
The preset values (TU=120% resp. TL=80%) should only be changed under the following aspects:
1. the 1-sheet range is permanently restricted, since the measuring values are very stable. Thus
the process security increases. The restriction can be done by decreasing the TU value, by
increasing the TL value, or both.
2. the 1-sheet range is temporarily extended. Thus the process security decreases. Such an action
should only be performed in exceptional cases, the user has to decide about that. Extending the
1-sheet range is commonly considered due to mechanical problems (fluttering sheets). This
measure prevents the machine from stoppages, until the mechanical problem is solved.
"Nom./curr. settling time"
Defines the time which the system requires to reach stable measurement results.
For details refer to chapter 3.7.2.
"Teach-In 1-sheet"
The Teach-In calibration has to be executed with the material to be processed.
The calibration applies only to the selected program.
"Teach-In 2-sheet"
Because of the linearization of the sensor it is possible to measure with factory calibration in many
applications, as long as thickness, conductivity and material type are known
For a more precise indication, the system can additionally be calibrated to a 2-sheet condition.
The calibration applies only to the selected program.
3.5.3.2 Program parameters for the Monitoring Parts for Hardened / Tempered Properties and
Materials Mix up
This menu structure is valid for the system types g (for details refer to chapter 3.2) For measuring
an eddy current method is used – called "Transmission" measurement. Compensation curves are
being used for linearization. In order to avoid frequent Teach-In procedures for different materials
and thicknesses, the unit provides for 255 program memories. Every such memory consists of a
data set with the relevant parameters.
"Program number"
Selects the number of the data set (1...255) which is to be applied for measurement.
"Sensor number"
Input of the selected sensor (/sensor sequence) for multi-channel systems (e.g. I20-4-...).
"Frequency"
Adjustment of the measurement frequency for this measurement program.
"Lower limit TL" and "upper limit TU"
Changes the limit values for the lower and upper switching threshold. The values can be entered
in %. On these thresholds depend the status signals.
In a window comparator the three signals will be generated from the measuring signal. The signal
"0-sheet" is generated when the measuring signal falls short of the lower switching threshold TL.
The lower switching threshold TL can be set from 1...99%. The signal "2-sheet" is generated when
the upper switching threshold is exceeded. The upper switching threshold TU can be set from
100...180%. If the measuring value is within both limits, the signal "1-sheet" is generated.
ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
Manual
Double Sheet Detector-series I20
System description
25