Ink System; Pump Motor; Ink System Driving Conditions - Epson Stylus Photo RX700 Service Manual

EPSON Stylus Photo RX700

2.2.10 Ink System

2.2.10.1 Pump Motor

Item
Type 4-phase 48-pole PM type stepping motor
Voltage 42 V (DC voltage) ± 5% (voltage applied to the driver)
Winding resistance 7.6Ω ± 10%(25°C/phase)
Basic
characteristics
Inductance 13.4mH ± 20%(1kH 1Vrms)
Bipolar driving
Drive system 2-2 phase, 1-2 phase, W1-2 phase, 2W1-2 phase, 4W1-2
phase constant-current driving
Angle of rotation of pump shaft per step of driving resolution
Driving conditions
motor: 1.067 degrees/pulse (2-2 phase conversion)

2.2.10.2 Ink System Driving Conditions

With the Pump Motor as the drive source, the Ink System Assy is driven according to
the following conditions.
Drive settings (six modes)
Drive Mode Suction Speed Name
Constant-value drive -2
IS7
Constant-value drive
IS6
Low speed
IS5
Normal
IS4
High speed
IS3
Super-high speed 1
IS2
Super-high speed 2
IS1
Operation settings
Direction of Pump Motor Rotation
Counterclockwise (CCW) rotation as
viewed from the rear side of the output
shaft of the motor
Clockwise (CW) rotation as view from the
rear side of the output shaft of the motor
Operating Principles
Specifications
Revolving Speed of Pump Suction Flow
Wheel (revolutions/s) Rate (g/s)
– –
– –
0.8 TBD
2.2 TBD
3 TBD
5 TBD
6 TBD
Operation of Pump Unit
Cap open (moving down)
Pump release
Wiper setting
CR unlocking
Cap closed (moving up)
Pump suction
Wiper reset
CR locking
Mechanism Operating Principles
During CW rotation, the
pin of the Cap Assy moves Directions of
to raise the Cap Assy and
the Carriage Lock Lever. gears during
CW rotation
Pin
Cap Unit
Cap Assy
moves up to
push up the
lever and open
the tube cap.
Figure 2-31. Ink System
Revision A
rotation of
Carriage Lock Lever
40