Edge/Edge Blanket Repair
7-31
7.7 Sensors
The spreader/feeder uses two types of sensors:
photosensors, which rely on visual signals, and
proximity sensors, which rely on magnetic
signals.
Each sensor on the unit is physically aligned
and its sensitivity is adjusted during installation.
This is important for reliable operation of the unit.
Sensors that are misaligned or out of adjustment
can miss a piece of flatwork or give a false signal
when no material is there.
The single most common source of unreliable
sensor operation is dirt on the lens of a photosensor
or a reflector. Make sure all of the photosensors
and reflectors are free of lint or dust. Use either
a clean, soft cloth to clean each lens.
In addition, periodic adjustment or replacement
of some sensors may be required. These procedures
include:
General Photosensor Alignment
Corner Photosensor Alignment
Roll Photosensor Alignment
Taut Photosensor Alignment
Tail Photosensor Alignment
General Photosensor Sensitivity
Adjustment
Roll Photosensor Adjustment
Upper Corner Photosensor Adjustment
Photosensor Replacement
Proximity Sensor Positioning
Adjustment
Proximity Sensor Replacement
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General Photosensor Alignment
The alignment of photosensors is critical
to proper and productive operation of the
machine.
Most photosensors are mounted in a fixed
position and do not need adjustment. There
are four sensor sets which may require specific
adjustment, and these are covered in the following
procedures:
Corner photosensors
Roll photosensors
Taut photosensors
Tail photosensors
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