Scan Axis system: Carriage and Carriage impelling
This system moves the Carriage from left to right and right to left of the printer on top of the paper in a
controlled manner to perform printing, cutting, paper detection, and any other Carriage movements for
servicing and final capping process.
The system comprises the Carriage sliding on the scan axis rod, on which rotates and whose position is
determined by a cam mounted on the Carriage, which slides touching the bottom surface of the anti-
rotation rail.
There are two trailing cables mounted one on top of the other, which connect the Carriage with the
main electronics control board. A scan-axis encoder strip is needed for the Carriage to determine its
position, and a Carriage Motor which impels the Carriage via a belt.
The trailing cable is held in position by a plastic holder, which clips onto the scan axis structure. A
spring-loaded loop ensures follow-up action of the cables with the Carriage movement. Two plastic
cable sliders are also placed to ensure minimum contact of the trailing cables with the scan axis
structure. The plastic sliders are greased to prevent ink spray (aerosol) deposits from accumulating on
them, generating a sticky surface which could retain the cables and then be damaged by Carriage
movement.
The Encoder Strip Sensor is located inside the Carriage, once the Carriage is assembled the Encoder
Strip crosses the Carriage, passing by the detection area of the sensor inside the Carriage.
The main function of the Carriage is to hold the printhead in position, to enable cartridge insertion, and
to move the printhead in a controlled manner in order to print.
ENWW
Subsystems
23
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