Epson DFX-9000 - Paper Eject Mechanism

Epson DFX-9000 Revision B
Operating Principles Printer mechanism 70
2.2.4.5 Paper eject mechanism
The DV roller R and the Nip roller in the Paper eject unit operate to
prevent line feeding errors. The drive force of the Open/Close (OC)
motor moves the OC slide cams on the left and right frames, and the two
cams move the Drive (DV) Roller R and the Nip roller to contact
(closed) or not contact (open) each other. The closed or open status is
detected by OC sensor 1 and OC sensor 2 on the left side frame. The OC
motor drive system is a unipolar, constant current drive.
Figure 2-13. Paper eject mechanism
Paper eject operation mode
NOTES:
1. If condition 1 or 3 is interrupted by a condition 2 event when the
Carrier unit to moves to the ribbon replacement position, the rollers
will return to the prior condition (1 or 3) the next time the Carrier
unit moves.
2. The Carrier unit moves to the ribbon replacement position under the
following conditions:
 When the power is turned ON
 When the printer is in PAUSE
 After the printer is reset
 Three seconds after entering an idle state
 After the paper eject operation is complete
OC Sensor 1
OC Sensor 2
DV Roller R
OC Slide Cam
OC Motor
Left Side Frame
Condition Roller 1 DV Roller R Status
1 Close Open From paper loading until the top
edge of the paper has advanced
41 mm (from head center)
2 Close Close  Normal and Reverse line
feeding
 When the Carrier moves to the
ribbon replacement position
(see Note 2)
 When a ribbon jam occurs
3 Open Open When paper is fed backward or
when a paper jams occurs