Epson Stylus Pro 9900 - Page 102

Epson Stylus Pro 7700/7710/7700M/7710M/7900/7910/9700/9710/9900/9910/WT7900/WT7910/9890/9908/7890/7908 Revision I
OPERATING PRINCIPLES Main Body 102
Confidential
PRESSURIZING UNIT
Figure 2-8. Pressurizing Unit
1
3
2
Diagram Name Description
1 Pressure Sensor
A transmissive photo interrupter to detect the
pressurizing status. It detects the status of the actuator
which operates when the pressure reaches up to the
specified amount.
2
Pressurizing Pump
Motor
Supplies air to pressurize the ink pack. A DC motor
with an encoder scale mounted on it is employed.
3
Pressurizing Pump
Motor Encoder
Detects patterns of the scale attached on the motor to
control the rotation of the Pressurizing Pump Motor.