Epson Stylus color 600, Service Manual, Page: 50 / 154

EPSON Stylus Color 600
Rev. A
2-12
Papers on the ASF (auto-sheet-feeder) supplied by the user are carried to the printer inside by paper
pick up sequence. Unlike the previous models, ASF of Stylus Color 600 has mufti feed prevention
mechanism. Following explains this function and figure below shows its mechanism.
[1. Multi feed prevention mechanism]
When the Load/Eject button is pressed, reversed rotation of PF motor is performed.
The return lever resets papers which are already in the out of stand by position in the stand by position
and make it possible to perform stable paper feeding by picking up the paper again.
Following explains process of multi feed prevention step by step. Refer to the figure above and confirm
its operation.
[Step 1] When the load/Eject switch is pressed or printing order is input from the PC, PF motor rotates
counterclockwise and makes the CAM rotate towards direction of 1 in the figure above.
[Step 2] When the CAM covers the notch by the return lever, that position is considered as home
position, being monitored by ASF sensor.
[Step 3] When the CAM rotates toward 1 in the figure above, the return lever is pushed by the notch
of CAM and falls towards 2. At this time, the return lever moves to direction 3 by this
motion, and push down the pad which is waiting in the below part. At this time, friction of
pinch roller and pad will be canceled.
[Step 4] The papers which are out of stand by position by the previous paper feed motion are
returned to the paper stand by position by flip over strength of return lever. After this,
PF motor rotates clockwise and the printer goes to pick up sequence.
Return Lever
Pad spring
Hopper spring
Hopper
Pintch Roller
D-Cut Roller
CAM
[Standby state]
[Returning state]
1)
2)
2)
Figure 2-9. Multi Paper Feed Prevention Mechanism