Print Mechanism - Epson Stylus Pro 3800 Service Manual

Epson Stylus Pro 3800/3800C/3850/3880/3885/3890

2.2 Print Mechanism

This section explains the basic specifications of the print head.
NOZZLE CONFIGURATION AND COLORS
This printer is equipped with an MACH print head, which employs 180 nozzles per
color. The printer ejects nine different colors of ink through the eight rows of nozzles.
One of the rows is shared by Photo Black and Matte Black inks.
The nozzle configuration as seen from behind the print head is shown below.
Printing method: On-demand ink-jet
Nozzle configuration: 180 nozzles x 8 rows = 1440 nozzles
Carriage Moving Direction
Figure 2-4. Nozzle Configuration
OPERATING PRINCIPLES
Nozzle Row
Epson Stylus Pro 3800/3800C/3850
A
B
C
D
E
F
G
H
DRIVE WAVEFORMS
The following four drive waveforms are used to create four print modes.
Table 2-5. Print Modes (Drive Waveforms)
Waveform Drive Frequency
Name
VSD1
VSD1
VSD2
VSD3
Print Mechanism
Table 2-4. Nozzle Rows and Colors
Color
Epson Stylus Pro 3880/3885/3890
Magenta
Cyan
Photo Black/Matt Black
Yellow
Light Light Black
Light Black
Light Cyan
Light Magenta Vivid Light Magenta
Print Resolution
(kHz) (dpi)
10.08 360 x 360
720 x 360
10.08
720 x 720
10.08 1440 x 720
20.16 2880 x 1440
Revision C
Vivid Magenta
CR Speed
(cps)
280
280
280
280
40