Auto Sheet Feeder Mechanism - Epson Stylus 1500 Service Manual

Operating Principles
PF Motor
Release Gear PF Motor Pinion Gear
Disengage Gear
To Tractor
To A SF
ASF Tra nsmission Ge ar
PF Roller
Paper Eject Roller
Pu mp Un it
Eject Roller Unit
Eject Paper Shaft
Figure 2-6. Paper Feed Mechanism

Auto Sheet Feeder Mechanism

The PF motor torque is transmitted to the ASF pickup rollers via a planetary gear in the disengage
mechanism. The pickup roller shaft has two arms on each side. The arms engage the paper
support to cause the paper surface to contact the pickup rollers. The one-way clutch makes the
rollers rotate in one direction for paper pickup. When not in paper pickup motion, the planetary
gear does not transmit torque to the pickup roller shaft.
After picking up paper, the planetary gear is released from the ASF mechanism. The torque of the
PF motor is then transmitted to the paper feed mechanism.
One Way Clutch
Pinion Gear
PF Motor
Disengage Gear
ASF Me chan ism
Paper
Pickup Roller
ASF Transmission Gear
Paper Support
PE Sensor
PF Roller
Figure 2-7. ASF Mechanism
2-8 Rev. A