EPSON WF-C5790/WF-C5790a/WF-C5710/ET-8700/WF-C5210/WF-C5290/WF-C5290a Revision A
Configuration and operating principles Operating principles 57
Confidential
ASF Mechanism (Optional cassette)
This mechanism picks up paper from the Optional Cassette, and conveys it up to
the intermediate feeding mechanism of the printer, and the same retard separation
method as that for the Paper Cassette of the printer is adopted.
The ASF mechanism is configured by the pickup mechanism and the intermediate
feeding mechanism, and operates by the driving force of the ASF Motor.
Pick-up mechanism
On the shafts of the Pick-up Roller and Separation Roller, the One Way Clutch is
mounted to always rotate in a set direction (paper feed direction) only. When the
ASF Motor rotates the opposite direction of paper feeding, the drive force is cut off
by the One Way Clutch, so neither the Pick-up Roller nor Separation Roller rotates.
Intermediate feeding mechanism
A One Way Clutch Gear is provided in the middle of the drive path in the
intermediate feeding mechanism, and the Vertical Feed Roller rotates in only
one fixed direction (paper feed direction). (If it is not in the paper feed
direction, it performs idling and no rotation.)
Figure 3-36. Drive path
Pick-up Roller/ Separation
Roller
ASF Motor
One Way Clutch Gear
Spur Gear 23
Spur Gear 63
Vertical Feed Roller
Compound Gear A
Spur Gear 22
Spur Gear
Pick-up Drive Shaft
One Way Clutch
Compound Gear B
Pick-up Drive Shaft
Spur Gear 63
One Way
Clutch Gear
Spur Gear 23
Spur Gear 22
Compound
Gear A
Spur Gear
Vertical Feed Roller
ASF Motor
One Way Clutch
Pick-up Roller/
Separation Roller
Retard Roller
Compound
Gear B
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