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EPSON Stylus PHOTO 810/820/830 Revision B
Operating Principles Overview 34
Figure 2-8. ASF paper loading sequence (Step 1, 2)
When the PF motor pinion
gear rotates CW direction
(Right side view), the
Change lever pushes
down the Clutch lever as
right figure and the Clutch
lock tooth is disengaged
from the Clutch gear. As
the result, the LD roller
shaft dose not rotate at all
because the drive of the
PF motor is not
transmitted. In this time,
the ASF hopper is also
pushed down by the ASF
hopper release lever on
the LD roller shaft, and
the Paper return plate is
set to avoid that papers are
slipped down from the
paper set position.
This position is the ASF
home position.
When a paper is loaded
from the ASF unit, the
Change lever moves to the
front side of the printer
with the CCW rotation
(right side view) of the PF
motor pinion gear and
releases the Clutch lever.
As the result, the Clutch
turns back to the
engagement position by
the tension force of the
Tension spring 0.143.
And, the Clutch gear is
engaged with the Clutch
lock tooth to transmit the
drive of the PF motor as
left figure. In this time,
the Change lever is locked
instantaneously by the
protrusion on the backside
of the CR unit to change
over from the ASF home
position detection
function to the paper
loading function surely.
Step 1 (ASF Home position) Step 2
Hopper & Paper return plate condition
Hopper & Paper return plate condition
LD roller shaft
Hopper
Paper return plate
Torsion spring 29.1
LD roller
Gear rotation direction (Right side view)
Spur gear 10.8
(PF roller)
Clutch lever
Gear rotation direction (Right side view)
Change lever
Clutch lock tooth
Clutch gear
Clutch
<PF motor drive transmission path for ASF home position setting>
PF motor pinion gear (CW)
→
Spur gear 10.8 (PF roller) (CCW)
→
Combination gear 18.28 (CW)
→
Spur gear 27.2 (CCW)
→
Spur gear 25.6 (CW)
→
Change lever (CW)
→
Combination gear 16.32 (CCW)
→
Spur gear 35.2 (CW)
* Above transmission pass = seen from the right side of
the printer
To Front side
Tension spring 0.143
<PF motor driver transmission path for Clutch lever release>
PF motor pinion gear (CCW)
→
Spur gear 10.8 (PF roller) (CW)
→
Combination gear 18.28 (CCW)
→
Spur gear 27.2 (CW)
→
Spur gear 25.6 (CCW)
→
Change lever (CCW)
→
Combination gear 16.32 (CW)
→
Spur gear 35.2 (CCW)
* Above transmission pass = seen from the right side of
the print
ASF hopper
release lever
Compression
spring 2.50
ASF frame
Clutch gear
Clutch lock tooth