Epson 440 - Manual (Page 52)

EPSON Stylus Color 440/640/740 Revision A
Chapter 2 Operating Principles 52
2.1.1.5 Ink System
Ink system mechanism consists of 1)cap mechanism, 2)pump
mechanism, carriage lock mechanism, 4)waste ink absorber and 5)ink
sequence. Out of these mechanism, from 1) to 4) are physical
mechanism and parts which are mounted on the printer mechanism and
5) ink sequence is performed automatically by firmware. Also, unlike
previous models, since Stylus Color 440/640/740 has no engage/
disengage mechanism to change over pump mechanism and paper
feed mechanism, it is one of the major characteristics that pump and
platen are always at work whenever the PF motor is driven. The figure
below shows head positions when the ink system and various ink
sequence are performed.
Figure 2-10. Ink System Mechanism
Figure 2-11.
Major Ink Sequence Position on Carriage Working Area
PF Roller Drive Gear
Eject Roller
Drive Gear
Eject Roller
TransmissionGear
PF(Pump) Motor
Pinion Gear
Pump Roller
Cap Unit
Cleaner Blade
Carriage Lock Lever
A B C D E F G
Printable Area
2976 dot(360-dpi)
A: Dummy Pumping Position(CRHP)
B: Ink Dischage Position
C: Flashing Position
D: Wiping Complete/Rubbing start Position
E: I/C Replacement Position
F: ASF Pick up Position