Epson Stylus Color, Service Manual

Page: 44 / 151

Chapter2 Operating Principles
Rev. A
2-7
2.1.1.2 Carriage Mechanism
Carriage mechanism is to drive the carriage with print head from left to right or vice versa.
The carriage drive motor in this printer is a 4-phase, 200-pole stepping motor and is driven by
1-2phase, 2-2phase and W1-2phase drive method. This stepping motor allows the carriage to
move freely to the particular positions which is necessary for various operation, such as paper feeding,
ink absorbing, flashing, ink exchange and cleaning operations. The tables below show carriage motor
specifications and motor controls at each mode.
Item Description
Motor type 4-phase/200-pole Stepping motor
Drive voltage Range
42VDC
±
5%
Internal coil resistance
7.8 Ohms
±
10%
(per phase under 25
°
C environment)
Driving speed(frequency) range[cps (pps)] 5(60) - 340(4080)
Control method Bi-Pola Drive
Mode Driving speed
[CPS]
Drive frequency
[PPS]
Drive method
High speed skip 340 4080 W1-2, 2-2,1-2phase drive*
Printing(1
→
80 column direction)
200 2400 W1-2phase drive
Printing(80
→
1 column direction)
200 2400 W1-2phase drive
Capping 80 960 W1-2phase drive
Wiping 40 480 W1-2phase drive
Cap(valve released) 20 240 W1-2phase drive
Cap (Release) 5 60 W1-2phase drive
*Note 1): The reason why plural drive methods exist is that following some sequences described below
exist in the each mode and, more stable carriage operation and printing are performed
individually by different drive methods. This drive method is necessary especially for high
speed skip.
Acceleration 1 mode
→
Acceleration 2 mode
→
Deceleration 1 mode
→
Deceleration 2 mode
Table2-2. Carriage Motor Specification
Table 2-3. Motor Control at each mode
Rotor
A
/A
/B
B
C209 MAIN Board
CN6(CN7)
1
3
2
4
Figure 2-7.CR(PF/Pump) Motor Internal Block Diagram