46
3BEFORE OPERATION
3.3 MECHANICAL SETTINGS
ALS
20x
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3.3.3 Positioning the label sensor
Release the thumb screw [50B].
Position the sensor along the axle in such a way as
to allow it to register the spaces between the labels.
The LEDs [50A] light up when the sensor is
positioned over a gap.
3.3.4 Setting the dancer arm
restoring force
The unwinder dancer arm is preset in a way, that a wide
range of label materials can be processed whithout
having to change the dancer arms restoring force.
Even so, very narrow label material can under certain
circumstances tear off or expand in a way which results
in poor labelling precision. In those cases, the restoring
force must be decreased.
Tool: 2.5 mm hex socket screwdriver
Turn the adjusting screw [51A] on the dancer arm
left to increase restoring force.
Turn the adjusting screw [51A] on the dancer arm
right to decrease restoring force.
A service technician can restore the factory set-
ting, see service manual chap. 9.4.3 section
„Adjusting restoring force of dancer arm“.
If the problem still occurs, although the restoring force
is already set to a minimum, there is the option of buil-
ding in some weaker springs.
The springs must be built in by a qualified ser-
vice technician. Instructions can be found in the
service manual, chap. 9.4.3 section "Replacing
dancer arm springs", „Narrow label kit“.
[50] Label sensor at the fixed L-shape dispensing edge.
[51] Setting screw (A) at the unwinder dancer arm.
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