Capacitive Label Sensor - Avery Dennison ALS 341 User Manual

Operators Manual
ALS 341
3.5.1

Capacitive label sensor

For transparent labels the standard photo label sensor doesn't work. In this case, use a
mechanical or a capacitive label sensor.
For correct automatic initialisation, the contrast setting has to be set to any value, if you
using not the standard photo sensor.
A mechanical sensor is limited in the speed. The bounce at the label edges produces wrong
signals.
There is optional a capacitive label sensor available (Leuze GK14/24L).
Adjustment of the sensor is carried out as follows:
Set sensitivity to maximum by turning the Potentiometer clockwise. Then rotate ½ turn
anticlockwise.
1. Remove label material out of sensor.
2. Perform base adjustment, that both LED "base adjustment" have the same brightness.
3. Put label with backing paper inside the sensor. Doing this, the LED "switch output" and the
left LED "base adjustment" are switched off. With backing paper only in the sensor both
LED are switched on. If the LED are lightning with label inside the sensor, increase
sensitivity in ¼ turn steps by rotating the sensitivity clockwise.
4. Check the adjustment over the complete length of label.
5. Carry out the above adjustment after mounting, cleaning or increasing sensitivity.
Figure 9 Capacitive sensor
Release 4/04 Page 17 Starting the labeller