Mounting Of Sensors - Roland R1000 Series Manual

B0048191 / Rev. 1.5
4.3

Mounting of sensors

The reliable function of the Double Sheet Detector depends to a great degree on the correct
mounting of the sensors. The following mounting rules should be followed:
• The sensor must be mounted perpendicular to the sheet and fully contact the sheet surface.
Foreign matter should not obstruct the contact.
• Tilting or air gaps between the sensor and the sheet surface can result in faulty
measurements.
• It is possible to cover the sensor surface with thin Teflon in order to avoid damage to the sheet
metal surface. However, this will reduce the performance and is, therefore, not recommended.
• Mounting in steel / distance to magnets
• It is important to set the under gauge threshold of the control unit and analyze the under
gauge signal at the 0-sheet output.
• It is important to set the upper gauge threshold of the control unit and analyze the upper
gauge signal at the 2-sheet output.
• A spring loaded mounting bracket or the installation directly into the vacuum cup is
recommended (see the following sections).
The UDK20 can detect unintentional air gaps. The lower limit ("low") should be used for this
purpose. The lower limit should be adjusted to more than 80%. An air gap causes a decrease of
the measured value. As soon as the measured value falls below the under gauge threshold, then
under gauge is signaled at the 0-sheet output. It is absolutely necessary that the control unit stops
the current operation and issue is a fault signal. Only if this fault condition is eliminated should
sheet processing be allowed to continue.
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
with integrated fieldbus interface
X
X
Attention Air gaps can result in faulty measured values. This applies also to
tilting or partial gaps or bowed sheets. Ignoring these factors can
result in unreliable operations.
Manual
X
5 mm
Y
X = Sensordurchmesser
Sensor diameter
½
y = Sensordurchmesser
½
Sensor diameter
keine Magnete
no magnets
kein Stahl
no steel
Mounting
37