Epson STYLUS Scan 2000 Service Manual page 40

EPSON Stylus Scan 2000
SMALLER TRAILING-EDGE MARGIN
Like the Stylus COLOR 740, this model uses a new design to allow printing up
to the last 3mm by changing the design and position of the star-wheel gear.
The star-wheel gear assembly has been shifted 5 degrees from directly on top
of the eject rollers towards the front paper guide. This change suppresses the
tailing edge of the paper so that the old minimum margin of 14mm has been
reduced to only 3mm.
Old Feeding
Method
Star wheel
Assembly
Paper
Eject rollers
Platen
New Feeding
Method (from
Moved to a 5
COLOR 740)
degree angle
Figure 2-10. 3mm improved margin (viewed from right side)
Operating Principles
Printhead Support roller
3mm bottom margin
may contact printhead
This area remains
stable
Printer Mechanism Operation
CARRIAGE LOCK MECHANISM
The carriage lock mechanism prevents the carriage from being left at an
uncapped position for a long time which can occur due to user mistakes,
physical shock, vibration during transport, and so on. The CR lock mechanism
is driven by the stepping PF motor. See Table 2-5, "PF Motor Specifications,"
on page 37 for motor specifications.
The PF motor controls the CR lock mechanism as well as the PF mechanism
depending on the direction of the PF motor rotation. The CR lock mechanism is
located at the right end of the paper eject roller.
PF roller
Top view
Bushing 6
Paper Eject
roller
Middle frame
While the PF motor drive is used for paper feeding (PF motor rotation = CCW),
the CR Lock Lever is set under the Paper Eject Frame. But the CR Lock lever
rises up and locks the carriage when the PF motor rotates CW.
Right-side view
Pump Planetary
Lever
Carriage
CR Lock
Lever
Pump
Planetary
Lever Guide
Figure 2-11. CR Lock Mechanism
Revision A
40