Epson Stylus Color 640 Service Manual page 47

EPSON Stylus Color 440/640/740
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
Items
Motor type
Drive voltage Range
Internal coil resistance
Driving Speed(frequency)
Range[csp(Hz)]
Control method
Table 2-2. Motor Control at Each Modes (Stylus Color 440, 640)
Drive Speed
Printing mode
[CPS]
High Speed Skip 340
Normal Printing 200
Capping 80
Wiping 40
Cap
20
(Valve Release)
Withdrawal of cap 5
Chapter 2 Operating Principles
Description
4-Phase/200-pole Stepping motor
42VDC 5%
7.8 Ohms 10%(per phase under 25 C
environment)
5(60) 340(4080)
Bi-Pola Drive
Drive frequency
Drive method
[PPS]
W1-2, 2-2,1-2
4080
phase drive*
2400 W1-2, 2-2 phase drive
960 W1-2, 2-2 phase drive
480 W1-2, 2-2 phase drive
240 W1-2, 2-2 phase drive
60 W1-2, 2-2 phase drive
Table 2-3. Motor Control at Each Modes (Stylus Color 740)
Drive Speed
Printing mode
[CPS]
High Speed Skip 340
Normal Printing 200
Capping 80
Wiping 40
Cap (Valve
20
Release)
Withdrawal of cap 5
Rotor
Figure 2-5. CR (PF) Motor Internal Circuit Diagram
Revision A
Drive frequency
Drive method
[PPS]
W1-2, 2-2,1-2
4080
phase drive*
2400 W1-2, 2-2 phase drive
960 2W1-2, 2-2 phase drive
480 2W1-2, 2-2 phase drive
240 4W1-2, 2-2 phase drive
60 4W1-2, 2-2 phase drive
1
A
3
/A
2
B
4
/B
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