Machine Adjustments
Belt Tension
Apply enough tension to keep the belt from slipping on
the roller. Excessive tension is unnecessary and may
shorten the useful life of the belt.
Belt Tracking
Belt tracking is adjusted with the knobs on the end of the
conveyor frame. Increasing the belt tension on one side
will cause the belt to track towards the opposite side of
the dryer frame. Decreasing the belt tension on one side
will cause the belt to track towards that side. Additional
adjustments my be required when the oven reaches full
temperature or as the belt stretches with wear.
Load and Object Detectors Adjustment and Cleaning
The load sensors and object detection sensors must
work correctly for proper operation of the machine.
These sensors send an invisible beam of light to a
reflective target located under the belt. The beam is
reflected by the target and detected by the sensors. A red
light above each sensor is activated when the sensor
detects the target. If the target is not detected when
nothing is blocking the beam, the sensor lenses and
target should be cleaned with a rag. Mild solvents may
be used to clean off stubborn deposits. Sensors must be
pointed at targets, and targets must be located directly in
the line of sight of the sensors.
Height Sensor Adjustment and Cleaning
The height sensors on the Firefly operate in emitter-
detector pairs shown in
Figure 1
. One sensor emits a
visible red laser beam, while the paired detector senses
the beam. If an object blocks the beam, the machine
stops the belt and alerts the user to a height sensor error.
The height of the beam may be adjusted by moving the
sensors up or down in their mounting slots. A yellow
light on the detector indicates detection of the emitted
beam. The emitter and detector pairs must be aligned
such that the beam is always triggering the detector
when nothing is blocking the beam. It may be necessary
to clean the lenses on the emitter/detector pairs if foreign
debris accumulates on the lenses.
