Epson Stylus Color 440, Service Manual

Page: 47 / 212

EPSON Stylus Color 440/640/740 Revision A
Chapter 2 Operating Principles 47
2.1.1.3 Carriage Mechanism
Carriage mechanism is to drive the carriage with print head mounted
from left to right or vice versa. The carriage drive motor in these printers
are a 4-phase, 200-pole, stepping motor and is driven by 1-2 phase, 2-2
phase and W1-2 phase drive method for Stylus Color 440, 460, and by
2-2 phase 1-2 phase, W1-2 phase, 2W1-2 phase and 4W1-2 phase
drive method for Stylus Color 740. 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.
Table 2-1. Carriage Motor Specifications
Table 2-2. Motor Control at Each Modes (Stylus Color 440, 640)
Table 2-3. Motor Control at Each Modes (Stylus Color 740)
Figure 2-5. CR (PF) Motor Internal Circuit Diagram
Items 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[csp(Hz)]
5(60)
∼
340(4080)
Control method Bi-Pola Drive
Printing mode
Drive Speed
[CPS]
Drive frequency
[PPS]
Drive method
High Speed Skip 340 4080
W1-2, 2-2,1-2
phase drive*
Normal Printing 200 2400 W1-2, 2-2 phase drive
Capping 80 960 W1-2, 2-2 phase drive
Wiping 40 480 W1-2, 2-2 phase drive
Cap
(Valve Release)
20 240 W1-2, 2-2 phase drive
Withdrawal of cap 5 60 W1-2, 2-2 phase drive
Printing mode
Drive Speed
[CPS]
Drive frequency
[PPS]
Drive method
High Speed Skip 340 4080
W1-2, 2-2,1-2
phase drive*
Normal Printing 200 2400 W1-2, 2-2 phase drive
Capping 80 960 2W1-2, 2-2 phase drive
Wiping 40 480 2W1-2, 2-2 phase drive
Cap (Valve
Release)
20 240 4W1-2, 2-2 phase drive
Withdrawal of cap 5 60 4W1-2, 2-2 phase drive
Rotor
1
2
3
4
A
/A
B
/B