Avery Berkel CX20 SERIES, Service Manual

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2 — General and Technical
2–7 CX20/CX30/CX34 Service Manual
2.1.2 CX20 W and CX9/A702
The CX20 W and CX9/A702 machines are used in conjunction with ULMA
Automatic Stretch Wrapping machines. Together they provide indicating,
printing and weighing functions and are an integral part of the wrapping
equipment. They can also be used on other manufacturers stretch wrapping
machines.
Figure 2.4 ULMA Wrapping Machines
The CX20 W is an indicating and printing machine. It provides an RS232 output
for communication with the wrapping machine and generates the wrapper
program number.
The CX20 W is a modified version of a CX20 LS in which the transducer
assembly, cross assembly, weighplate and customer display have been
removed. Added to it are an RS232 interface PCB, a photocell detector and
three output connectors. In place of the customer display is a metal plate.
The RS232 interface PCB is fitted over six pillars screwed in to the base of the
CX20 W, adjacent to the power supply. It is secured to the top of the pillars with
six screws with integral shakeproof washers.
The photocell is fitted to a bracket, attached to the printer spine. The head of
the photocell is positioned just in front and above the print head (where the
paper roll exits the printer).
An output for connection to the remote transducer (CX9/A702) is fitted to the
connector plate assembly towards the rear of the machine. Two outputs for
connection to wrapping machines are fitted to an output plate. This plate is
fitted above a cut-out in the base adjacent to the RS232 PCB, towards the rear
of the of the machine.