Brother International 1800C Service Manual - Page 27

printing, capping, mechanisms

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3.2.2.2 Ink jet printing and capping mechanisms Carriage encoder Main chassis Carriage motor Carriage PCB Ink cartridge sensors Ink cartridges Ink empty sensor Carriage (Star wheels) (Paper ejection roller) Carriage rail Platen Print head unit (1) Print head unit This machine uses drop-on-demand ink jet printing. Each of the right and left print heads has an ink-jet unit that has a pair of nozzle columns for two color inks. A nozzle column consists of 75 nozzles, 75 channels covered with piezoelectric ceramic (PZT), a manifold, and filter. As illustrated below, the pair of nozzle columns is staggered. Carriage travel direction 13.039 (154/300"). 0.1693 (1/150") 410 20 0 0 3O ° 4O ° 0 0 0 0 0 0 0.3387 (1/75") f Paper feed direction 710 720 730 0 0 0 740 O #750 \, • Black Cyan ooo °°° O° Yellow Magenta Ink-jet units Nozzle Layout (viewed from the bottom) 3-6

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#750
3.2.2.2
Ink
jet
printing
and
capping
mechanisms
Carriage
encoder
Carriage
motor
Main
chassis
Carriage
PCB
Ink
cartridge
sensors
Ink
cartridges
Ink
empty
sensor
Carriage
(Star
wheels)
(Paper
ejection
roller)
Carriage
rail
Platen
Print
head
unit
(1)
Print
head
unit
This
machine
uses
drop
-on
-demand
ink
jet
printing.
Each
of
the
right
and
left
print
heads
has
an
ink
-jet
unit
that
has
a
pair
of
nozzle
columns
for
two
color
inks.
A
nozzle
column
consists
of
75
nozzles,
75
channels
covered
with
piezoelectric
ceramic
(PZT),
a
manifold,
and
filter.
As
illustrated
below,
the
pair
of
nozzle
columns
is
staggered.
Carriage
travel
direction
13.039
(154/300")
.
0.1693
(1/150")
410
0
0
20
0
0
3O
°
0
0
4O
°
0
0
710
720
0
0
730
740
O
O
0
\,
•
Black
Cyan
o
°
o°
o°
O
°
Yellow
Magenta
Ink
-jet
units
0.3387
(1/75")
f
Paper
feed
direction
Nozzle
Layout
(viewed
from
the
bottom)
3-6