31 March, 1997
PRINTER
2-3
Detailed
Descriptions
2.2.2 CARRIAGE DRIVE MECHANISM
The carriage drive motor [A] drives the print head carriage [B] through the belt [C].
The sensor [D], located under the carriage generates a pulse signal while it moves
along the encoder [E] (a thin metal plate with many slits), so that the printer engine
can detect the horizontal location of the carriage.
2.2.3 INKJET CARTRIDGE
The inkjet cartridge uses a thermal ink jet
mechanism. When the print head receives print
signals, the heating element [A] located by ink
chamber [B] generates a tiny bubble inside the
chamber to eject an ink drop out of it.
The nozzles are arranged in a straight line at
intervals of 300 inch. The black print head has 58
nozzles, of which 52 nozzles are for printing. The
color cartridge has 48 nozzles, 16 for each color.
2.2.4 PRINT HEAD MAINTENANCE UNIT
When the print head needs cleaning, the
maintenance motor [A] moves the head cap [B] up
and down towards and away from the print head.
This action sucks waste ink out of the nozzles on
the print head.
Then, the maintenance motor moves up the wiper
blade [C], and the carriage moves right and left to
wipe the waste ink off the print head.
After these maintenance actions have finished, the
print head stays at the default position, and the
cap [B] caps the head.
H905d004.cdr
H905d005.cdr
Ink
H905D006.vsd
H905D007.cdr
[A]
[B]
[A]
[B]
[C]
[D]
[E]
[A]
[B]
[C]
