Technical data

70
4OPERATION
4.4 SETTINGS IN THE EXTENDED MENU
ALS
350
450
4.4.6 Adjust the label stop sensor (CONT)
Technology
Automatic and manual adjustment
The sensitivity of the label stop sensor must be adjust-
ed to match the transparency of the labels and the
backing material. In most applications, it is possible to
allow the sensitivity of the sensor to be adjusted auto-
matically.
When using labels with only a slight difference in the
transparency of the label and the backing material, per-
forated labels or labels with block outs:
£ Manually adjust the sensors as described below.
Non-standard photoelectric sensors
In series production, the labeller is equipped with a
photoelectric sensor manufactured by Wenglor.
When using transparent labels or labels with a very
slight difference in the transparency of the label and the
backing material:
– It is possible that the gap between two labels will not
be detected. Instead of just one label, two or more
labels might be dispensed.
– Use of a mechanical or capacitive sensor is recom-
mended.
– A mechanical sensor is only of limited use at high
dispensing speeds.
When using a non-series production photoelectric sen-
sor:
£ Reduce the setting value for CONT to NONE.
– For information on connecting a mechanical or ca-
pacitive sensor, see the service guide.
Automatically adjusting the photoelectric
sensor
£ Press and hold the FEED key and switch on the ma-
chine at the main switch.
– The message AUTO appears on the operator panel.
or:
£ When the machine is switched on, call up the INIT
function.
£ Press and hold the FEED key.
– The machine slowly starts up and dispenses a label.
– The label distance is automatically measured.
– The photoelectric sensor is adjusted.
£ Release the FEED key once a label gap has passed
the photoelectric sensor at the dispenser head.
If the adjustment (measurement) was successful:
– "ON" appears on the operator panel.
If the adjustment (measurement) was not successful:
– The message FAIL appears on the operator panel.
£ Manually adjust the sensor.