Epson Stylus Color 670 Service Manual

EPSON Stylus COLOR 670 Revision A
Operating Principles Overview 37
2.1.4 Paper Feeding Mechanism
The paper feeding mechanism consists of paper feed motor (PF motor), PF
roller, paper eject roller, paper guide, and so on.
The paper feeding mechanism feeds paper loaded from ASF using the PF
roller and paper eject roller.
Figure 2-5. Paper Feeding Mechanism (Top View)
The following stepping motors are used to drive the paper feeding
mechanism.
When DE (disengage) lever is at normal position, torque from the PF motor is
sent to the PF roller and paper eject roller as described below.
o To the PF roller:
PF motor pinion gear
→ Combination gear (3, 30) → Spur gear (67.2) →
PF roller
o To the paper eject roller:
PF motor pinion gear
→ Combination gear (6, 34.4) → Spur gear (36) →
Paper eject roller
EPSON Stylus COLOR 670 allows printing up to the last 3mm like EPSON
Stylus Photo 720 / EPSON Stylus Photo EX3. The star-wheel roller assembly
has been shifted 5 degrees from directly on the top of the eject roller towards
the paper feed roller. This suppresses the tailing edge of the paper so that the
old minimum margin of 14mm has been reduced to only 3mm.
Figure 2-6. Paper Transportation (Right side view)
Table 2-4. Paper Feed Motors
Item Description
Motor type 4-Phase/ 48-Pole PM Stepping motor
Drive voltage +42 V +/ - 5% (DRV IC voltage)
Coil Resistance 7.8 Ω +/ - 10% (per phase)
Inductance 14 mH +/ - 20%
Driving method Bi-Polar drive
Driver IC LB11847
Spur Gear 67.2
Spur Gear 36
Combination Gear
Pinion gear
Combination Gear 3,30
Combination Gear
Spur Gear26.4
Paper
Star Wheel Assy.
Printhead
Support Roller
PF Roller
Eject Roller
Platen
Five Degrees
Steady
Bottom margin 3 mm touches
the printhead surface.
[ Stylus COLOR 600 ]
[EPSON Stylus COLOR 670]

Epson Stylus Color 670 Specifications

General

Brand	Epson
Model	Stylus Color 670
Category	Printer
Language	English