Epson 440 - Manual (Page 44)

EPSON Stylus Color 440/640/740 Revision A
Chapter 2 Operating Principles 44
2.1.1 Printer Mechanism
Like previous EPSON Ink Jet printers such as Stylus Color 400, 600,
Photo, Photo 700, Photo EX, the printer mechanism of Stylus Color
440/640/740 does not have an exclusive mechanism to change over
paper feeding and pumping operation. In stead, this control is done by
the turning direction of paper feed/pump motor and position of the
carriage at that time. Also, the print heads of these printers combine the
black and CMY heads in one unit. The followings indicate the nozzle
configurations of these 3 models.
Stylus Color 440:
Black Nozzle:
64 nozzles(90 dpi x 2 rows in staggered)
CMY Nozzle: 21 nozzles/colors(90 dpi x 1 row)
Stylus Color 640:
Black Nozzle:
64 nozzles(90 dpi x 2 rows in staggered)
CMY Nozzle: 32 nozzles/colors(90 dpi x 1 row)
Stylus Color 740:
Black Nozzle:
144 nozzles(120 dpi x 3 rows in staggered)
CMY Nozzle: 48 nozzles/colors(120 dpi x 1 row)
Among these printers, the Stylus Color 640 and 740 can print 1440 (H)
x 720(V) resolution like Stylus Color 800 and Pro5000. On the other
hand, the Stylus Color 440 can print real 720 dpi(720 (H) x 720(V))
resolution like Stylus Pro XL.
Figure 2-1 in the in the right column shows the outline of the printer
mechanism.
Figure 2-1. Printer Mechanism Block Diagram
Carriage Motor
Paper Feed
Motor
Pump Position
Paper Load
Trigger Lever
Carriage Unit
(Print Head Unit)
Hopper
Drive
Pump
Drive
Timing
Belt
PF Roller Drive