General Hints For Process Reliability - Roland Double Sheet Detector R1000 Series Manual

B0069991 / Rev. 1.7
Fig. 8: Glass turntable
Operation
• Instead of the nominal thickness the test frequency is selected for the adjustment of the
program parameters. The type of material adjustment is not necessary. The optimum test
frequency is determined at no charge in the application lab.
• The Teach in of 1 sheet and 2 sheet is substituted by the Teach-In of part A and part B
respectively. Preferably a good part is being used being used for the Teach-In.
3.3

General hints for process reliability

The process security of the system is influenced by the following factors:
• the stability of the measuring values
• the setting of under-gauge threshold and over-gauge threshold
• the evaluation of the status signals
Stable measuring conditions will result in stable measuring results. Varying measuring results are
undesirable, because in such cases the user is inclined to decrease the under-gauge threshold and
to increase the over-gauge threshold. On doing so, the user puts up with the drastically increasing
risk of not detecting a double sheet.
The following external factors decisively influence the stability of measuring results and need to be
considered for operation of a double sheet detector:
• the magnetic characteristics of the material
• the tolerance in material thickness
• the geometric conditions at the place of measurement and at the sheet
• the pre-magnetization of FE material in case of magnetic transport systems.
• the smooth run of the material, with low vibrations
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
19