allow the primer to pass through it and make contact with the printheads. Some parts help to transmit force
to the printheads holding them in position and transmitting information of when the ink should be dropped.
Under-carriage protector
This part covers the bottom area of the carriage in order to keep it clean. It also protects the printheads from
encounters with the substrate.
Sensors
The SOL, the Tetris, and the encoder sensor send information to the PCA board and is passed to the
printmech though the trailing cable. The SOL performs a color calibration, the line sensor calibrates the
printhead alignment and detects other features (e.g. the substrate), and the encoder sensor detects the
movement of the carriage in relation to the Encoder strip.
Carriage PCA
This part contains the electronics to control how and when ink is dropped into each printhead, and receives
information from the sensors.
PCA Cover
This part covers the PCA to avoid aerosol contamination and acts as an electronic enclosure.
X-bias springs
The X-bias springs are sheet metal parts that hold the printhead in position in the X axis.
Covering sheet and metal parts
Bushings are bronze parts that are attached to the carriage base and slide over the rod.
Felts help to lubricate the rod and they also stop dirt going in between the carriage. They block four degrees
of freedom (Z and Y translation and rotation over the primary rod)
SOL protectors help to avoid the SOL shutter breaking after a substrate jam.
Plastic rear bushing blocks one degree of freedom (the X rotation over the primary rod). The dam protector,
are Mylar and stainless steel, and they stop the aerosol.
The plastic non-functioning printhead, is a plastic part which helps keep the carriage’s integrity when the
latch is applied over them. Also from a usability point of view, they avoid possible mistakes when inserting
the printheads, and have a cosmetic function too.
The airflow deflector partially stops the air entering into the print zone, it is used to avoid vapor
concentration over the substrate that also causes “dpe” (drop placement error).
Related tests, utilities, and calibrations
●
Scan Axis Menu service tests:
4. Scan Axis Menu on page 156
●
Carriage service tests
5. Carriage Menu on page 157
●
Open/close SOL
4.3.3 Color-Sensor Shutter Calibration on page 186
●
Carriage Calibrations
4.3 Carriage Menu on page 182
Service parts
●
Right hand Assemblies
●
Left hand Assemblies
34 Chapter 1 Printer systems ENWW
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