Epson Stylus C87, Service Manual

Page: 25 / 109

EPSON Stylus C87/C88/D88 Revision A
OPERATING PRINCIPLES Printer Mechanism 25
2.2.1 Printhead Specifications
This printer employs P-Match type printhead, which enables the product to perform
both the variable dot printing and the economy dot printing.
†
Nozzle configuration
„ Monochrome: 180 nozzles
„ Color: 59 nozzles x 3 rows/color (Cyan, Magenta, Yellow)
The following shows the arrangement of the nozzles and the color arrangement of each
nozzle line when viewed the printhead from behind.
Figure 2-2. Nozzle Rear View
NOTE: #60 nozzles of each color are not used for printing, but for flushing.
2.2.2 Carriage Mechanism
Main components of the carriage mechanism are carriage unit (including printhead,
CR encoder sensor, PW sensor), CR motor, timing belt, and CR scale.
2.2.2.1 CR Motor Specifications
C#60 K#180
K#179
K#3
K#2
K#1
C#59
C#1
M#60
M#59
M#1
Y#60
Y#59
Y#3
Y#2
Y#1
2.258mm
(32/360 inch)
0.1411mm
(1/180 inch)
Black
Color
Cyan: 59nozzles
Magenta: 59nozzles
Yellow: 59nozzles
Carriage Moving Direction
Paper Loading Direction
Table 2-1. CR Motor Specifications
Item
Specification
Type Motor with DC brush
Drive voltage +42 V
±
5% (applied voltage to the driver)
Electric resistance 22.65
Ω
±
10%
Inductance 17.3 mH
±
25%
Drive method PWM, constant-current chopping
Drive IC A6615