EPSON Stylus Photo 720 / EPSON Stylus Photo EX3
2.1.5 Paper Loading Mechanism (ASF Unit)
The paper loading mechanism is positioned at the printer rear and consists of paper
load roller, paper return lever, hopper, and so on. The paper loading mechanism loads
paper at the ASF unit and feeds paper to the PF roller. The ASF unit uses a PF motor.
Drive sent from this motor is switched between the ASF unit side and Pump/PF roller
side by the disengage mechanism when the CR unit moves to the left end of the CR
guide shaft.
Drive from the PF motor is transmitted to the ASF as described below:
Drive sent from PF motor is switched to ASF unit
o
The CR unit moves to the left end of the CR shaft
→
left end
the Spur gear 26.4 moves to the left side
PF motor CCW (counterclockwise).
Drive transmission to the ASF unit
o
→
PF Motor pinion gear
Combination gear (16, 21.6)
→
Spur gear (73.6)
Spur gear (26.4)
→
→
(23.2)
Spur gear (34)
ASF paper load roller shaft
Figure 2-7 shows the disengage mechanism and the parts involved.
Spur Gear 34
Spur Gear 73.6
Operating Principles
→
the DE lever is pushed to the
→
the Spur gear 26.4 revolves
→
→
→
Combination gear (16,40.8)
Spur gear
Spur Gear 23.2
Combination Gear
16,40.8
Spur Gear 26.4
PF Roller
DE lever
Figure 2-7. Disengage Mechanism (Top view)
When the PF motor torque is switched to the ASF unit side by the disengage
mechanism, the function of the ASF mechanism varies depending on the rotational
direction of the PF motor, as shown in the table below.
Table 2-5. ASF unit function & PF Motor rotational direction
Directions
Clockwise (*1)
Counterclockwise (*1)
(*1): The PF Motor rotational direction = seen from the PF motor pinion gear.
ASF unit stops the paper loading operation when the PE sensor detects that the paper is
loaded to the PF roller.
Overview
Corresponding Functions
• Picks up and loads paper
• Resets paper to the correct paper set position using
the Return Lever.
Revision A
37