Paper Eject Mechanism - Epson DFX-9000 Service Manual

Epson DFX-9000

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.
OC Slide Cam
OC Sensor 1
OC Sensor 2
DV Roller R
Figure 2-13. Paper eject mechanism
Operating Principles
Paper eject operation mode
Condition
1
2
OC Motor
3
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:
Left Side Frame
Printer mechanism
Roller 1 DV Roller R Status
Close Open From paper loading until the top
edge of the paper has advanced
41 mm (from head center)
Close Close
Open Open When paper is fed backward or
when a paper jams occurs
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
Revision B
Normal and Reverse line
feeding
When the Carrier moves to the
ribbon replacement position
(see Note 2)
When a ribbon jam occurs
70