Lifter Movement - Epson Stylus Pro 4400 Service Manual

EPSON Stylus Pro 4400/4450/4800/4880/4880C
LIFTER MOVEMENT (RAISING THE HOPPER)
1. When a print command is received from the PC, the LD Roller which has
been in standby condition first rotates to the paper feed side
(counterclockwise) by the required step number and then rotates in the
opposite direction from the paper feed side (clockwise) by the required
step number to return any paper remaining between the LD Roller and the
Separation Pad to the tray.
Standby Position
Paper
2. After completion of the paper return movement, the Release Hopper Lever
rotates counterclockwise with the LD Roller. When the Edge Guide Fixing
Lever releases the hook being pressed by the Release Hopper Lever, the
tension of the Compression Spring is released and raises the Hopper.
Hopper
Compression
Spring
Operating Principles
LD Roller
Flag
Phase Detection
Position
Release
Hopper Lever
Edge Guide Fixing Lever
Printer Mechanism Components
3. The LD Roller rotates in the counterclockwise direction and picks up paper.
Skew Correction Mode 1
1. Feeds the paper leading edge by 3.5mm between the Sub Roller
and Gate Roller.
2. The LD Roller stops, and reverse rotation of the Gate Roller and
Sub Roller corrects the skew by pushing back the paper being fed.
Stops
Revision C
Sub Roller
3.5mm
Gate Roller
138