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

EPSON Stylus Photo RX700 Revision A
Operating Principles Mechanism Operating Principles 40
2.2.10 Ink System
2.2.10.1 Pump Motor
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)
 Operation settings
Figure 2-31. Ink System
Item Specifications
Type 4-phase 48-pole PM type stepping motor
Voltage 42 V (DC voltage) ± 5% (voltage applied to the driver)
Basic
characteristics
Winding resistance 7.6Ω ± 10%(25°C/phase)
Inductance 13.4mH ± 20%(1kH 1Vrms)
Drive system
Bipolar driving
2-2 phase, 1-2 phase, W1-2 phase, 2W1-2 phase, 4W1-2
phase constant-current driving
Driving conditions
Angle of rotation of pump shaft per step of driving resolution
motor: 1.067 degrees/pulse (2-2 phase conversion)
Drive Mode Suction Speed Name
Revolving Speed of Pump
Wheel (revolutions/s)
Suction Flow
Rate (g/s)
IS7
Constant-value drive -2
––
IS6
Constant-value drive
– –
IS5
Low speed
0.8 TBD
IS4
Normal
2.2 TBD
IS3
High speed
3TBD
IS2
Super-high speed 1
5 TBD
IS1
Super-high speed 2
6TBD
Direction of Pump Motor Rotation Operation of Pump Unit
Counterclockwise (CCW) rotation as
viewed from the rear side of the output
shaft of the motor
 Cap open (moving down)
 Pump release
 Wiper setting
 CR unlocking
Clockwise (CW) rotation as view from the
rear side of the output shaft of the motor
 Cap closed (moving up)
 Pump suction
 Wiper reset
 CR locking
Directions of
rotation of
gears during
CW rotation
During CW rotation, the
pin of the Cap Assy moves
to raise the Cap Assy and
the Carriage Lock Lever.
Pin
Cap Unit
Carriage Lock Lever
Cap Assy
moves up to
push up the
lever and open
the tube cap.