Loop Sensor - Avery Dennison ALX 720 Service Manual

Service Manual
ALX 720
Sensor Connector
Label sensor CN15
(Full size)
Adjustment

3.3 Loop sensor

Function
Location
Sensor Connector
Loop sensor CN13
Adjustment
Release 11/2003
Adjustment condition
without material in label
sensor
with material
Without Material in the label sensor (only backing paper):
For adjustment select the function OTHR/SCHK/Pxxx and turn the po-
tentiometer P7 (I/O-board) to get the display value P7.
With material (label) in the label sensor:
A display value of >P7 should be shown.
The sensor measure the position of the dancer arm. Is the label loop not
filled, so the dancer arm is not in the home position, the printer starts
printing. If the loop is nearly empty a signal is generated to inhibit the
dispenser.
The loop sensor is mounted inside the machine at the dancer arm.
Adjustment condition Pot
Dancer arm in home posi-
tion
Dancer arm at end posi-
tion
Before starting the adjustment be sure that the white wedge angle is
mechanical correct adjusted. In the home position of the dancer arm the
thick part of the wedge angle should be positioned in the sensor.
Loop sensor in home:
For adjustment select the function OTHR/SCHK/Rxxx and turn the Po-
tentiometer P5 (I/O-board) until the value R85 is shown for a left hand
machine or R65 for a right hand machine.
Loop sensor in end position:
The value should so high as possible but not higher than R240.
difference between the home and the end value should be so high as
possible.
and SW02 (Inhibit signal for dispenser) has to be set in the sub menu
SYSP.
Page 9
Pot Value
Test point
Pot. P7 7
Value / Test
point
Pot. P5 LH: 85
RH: 65
The values itself are not important, but the
The trigger points SW01 (Start of print)
/ Para Display
meter value
Pxxx 7
>7
Para Display
meter value
Rxxx LH: 85
RH: 65
<240
ca. 150
Adjustment