Paper Feed Mechanism - Epson Stylus Pro 7700 Service Manual

Epson Stylus Pro 7700/7710/7700M/7710M/7900/7910/9700/9710/9900/9910/WT7900/WT7910/9890/9908/7890/7908

2.1.5 Paper Feed Mechanism

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1
14
13
12
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Figure 2-5. Paper Feed Mechanism
OPERATING PRINCIPLES
3
4
5
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10
Diagram Name
1 PF Encoder
Roller Release HP
2
Sensor
Driven Roller Release
3
Motor Assy
Driven Roller Release
7 4
Motor Encoder
5 PE Sensor
6 Paper Thickness Sensor
8
7 Rewind Motor
8 Rewind Motor Encoder
9
9 PW Sensor
10 Cutter Sensor
11 Suction Fans
12 Cutter Encoder
13 Cutter Motor
14 PF Motor
Main Body
Description
Detects the PF Scale patterns to control the paper
feeding (operation of the PF Motor).
Detects the position (Contact/Separate status) of the
driven roller.
Drives the driven roller. A DC motor with an encoder
scale mounted on it is employed.
Detects patterns of the scale attached on the motor to
control the rotation of the Driven Roller Release Motor
Assy.
A reflective photo interrupter to detect the presence of
paper.
Detects the thickness of paper being inserted into the
printer.
Takes up the slack of the roll paper when the motor
rotates normally, and rewinds the roll paper when it
rotates reversely. A DC motor with an encoder scale
mounted on it is employed.
Detects patterns of the scale attached on the motor to
control the rotation of the Rewind Motor.
Detects the width of paper on the platen. It is a
reflective photo interrupter and detects the difference of
the amount of reflection between paper (white) and the
platen (black).
Detects the origin position of the cutter.
Suck paper to the platen so as to stabilize the position of
paper when printing. Three fans are mounted for Epson
Stylus Pro 9700/9710/9900/9910/9890/9908, and two
fans for Epson Stylus Pro 7700/7710/7700M/7710M/
7900/7910/WT7900/WT7910/7890/7908.
Detects patterns of the scale attached on the motor to
control the rotation of the Cutter Motor.
Drives the cutter. A DC motor with an encoder scale
mounted on it is employed.
The motor to drive the Feed Roller.
Confidential
Revision I
99