Avery Dennison ALS 350 - Manual (Page 70)

70
4 O
PERATION
4.4 S
ETTINGS 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.