Maintenance Manual General Overview
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1.2.3.1 Mechanical Assy
This block is composed of a rubber platen roller with a carriage carrying a print head with
24 needles in front of the platen.
This movement is obtained via a step-motor (providing 1/120" movement per step) and a
minipitch belt.
The movement of the rubber drum for paper traslation is obtained via a specific step
motor providing a minimum movement of 1/180" and a couple of minipitch belts.
The motion of the ribbon cartridge is obtained through a specific step-motor
indipendently from the actual carriage speed, movement, direction and width.
In this way in front of the print head there is a continuously renewing well inked ribbon.
The ribbon speed is optimized to reduce conflicts with ribbon and graphic printout
appearance when ribbon and print head are moving in the same direction.
The color ribbon and the extended life black cartridges are moved up and down through
a linear actuator (step motor) with a plastic coupler that transmits the axial movement to
the plastic print head mask installed on the color ribbon cartridge.
Another step motors is used for the A.G.A. (automatic gap adjustment) of the print head
movement to have the best perfomance on the paper in use.
1.2.3.1.1 Tractor Unit Assy
A removable push tractor unit is installed on the printer.
Inside of it, a DC motor switches to engage/disengage the gear to allow the fanfold or
the single sheet to be fed.
The tractor unit can be installed in two different positions depending on the type of
fanfold management (front - rear - both).
In the next chapter all the paper handling possibilities of this mechanism are detailed.
1.2.3.2 Print Head
The core of the printer is the print head, which is an electromagnetic non- ballistic type
with a life of 400 MChrs.
See chapter 3.1.3.1 and 7.1.1 for major hardware and mechanical details.
1.2.3.3 Cabinet
The cabinet allows safety-proof lifting of frontal part for ribbon substitution and paper
path check.
It is composed of various parts to allow an easy access to all the printer internal parts.
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LA400 Multiprinter 1. 6 ER-LA400-SV
