Slicer/Applicator
SS-10.DOC:1/26/2007 11:08 AM
Grote Company
34
Teaching the Photoeye
For each product that is run, the photoeye must be taught to recognize the targets on the
conveyor belt. This teaching cycle is controlled by the PLC and requires eight seconds to
perform.
Before starting the conveyor, place targets on the belt as follows:
1. Place a sufficient number of targets on the belt so that it will take at least three
seconds for all of them to pass under the eye.
2. Position the first target in the pattern far enough away from the eye so that it will
not reach the eye for at least five seconds after the conveyor is started.
3. Space the targets the same as they will be during actual production.
To perform the teaching cycle:
1. Place the machine into “Teach Mode”.
2. Start the conveyor and when the first target is five seconds away from the eye,
press F7 to activate the cycle.
3. The eye should not see any targets for five seconds and then see targets for the
next three seconds after which the cycle automatically ends.
The message “Teaching Photoeye” appears on the Operator Interface screen during the
teaching cycle. Repeat the procedure for each lane on multi-lane slicers.
Resetting the Photoeye
If the above procedure for teaching the photoeye is not successful, it may be necessary to
reset the photoeye. If the green LED on the amplifier is flickering, instead of solidly on,
this indicates that the contrast between the target and the conveyor is marginal and that the
photoeye needs to be reset.
Resetting the photoeye requires two operators. To reset:
1. Move the Max-Set-Run switch to the
SET
position.
2. Position one operator at the fiber-optic photoeye.
3. Position the second operator at the fiber-optic amplifier located in the control
enclosure.
4. The operator near the fiber-optic photoeye should now completely cover the tip of the
fiber-optic eye with his finger or some other object and hold this position.
5. The second operator should push the yellow pushbutton located on the amplifier once,
and then release.
6. The operator near the fiber-optic photoeye should now remove his finger or other
object from the tip of the sensor.
7. The second operator at the fiber-optic amplifier should push the yellow pushbutton a
second time and then release.
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