Avery Dennison ALS 350 - Manual (Page 29)

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2 E
QUIPMENT DESCRIPTION
2.5 C
ONTROL SYSTEM
ALS
350
450
2.5.3 Monitoring functions
During labelling operation, the electronic control sys-
tem and the sensors monitor the following functions.
Dispensing a label to each product
– A photoelectric sensor (product sensor) sends a sig-
nal when a product reaches the dispensing
edge [12B]. The signal from the product sensor trig-
gers the label feed for a single label.
– If individual labels are missing from the label ribbon,
the label feed compensates for this and advances
the label ribbon by one additional label distance (la-
bel compensation).
– If label compensation does not take place before the
next start signal of the product sensor, the product
does not get labelled. A warning message appears
at the operator panel.
– If the number of unlabelled products exceeds a cer-
tain value, the machine stops.
Label supply
– If no more labels arrive at the label stop
sensor [12A] [13A], the machine stops and sends a
signal to the output to the system controller.
– Roll diameter control (optional) [12D, E]:
If the diameter of the label roll on the unwinding
spool [12C] becomes too small, the control system
sends a warning message and a signal to the output
to the system controller. The diameter at which the
signal will be sent can be set by servicing techni-
cians.
If errors occur
If a malfunction occurs, the control system sends a cor-
responding message to the operator. If necessary, the
labelling operation is automatically halted. The ma-
chine simultaneously sends a signal to the system con-
troller.
[12] A Label stop sensor
B The product sensor sends a signal when the product has
reached the dispensing edge.
C Label roll on the unwinding spool
D Photoelectric sensor of the optional roll diameter control
E Reflector of the roll diameter control
[13] Backing material with a label under the label stop sensor (A)
B
A
C
D
E
A