Epson Stylus Color 800, Руководство по обслуживанию

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EPSON Stylus
&2/25
800
Rev. A
2-4
2.2.3 Carriage (CR) Mechanism
The CR mechanism is composed of the CR motor, Timing Belt, CR Guide Shaft, Top Frame, and Home
Position (HP) sensor. The torque from the CR motor is transmitted to the CR unit via the Timing Belt to
move the CR unit along the CR Guide Shaft both right and left, depending on the direction in which the CR
motor rotates. When the CR unit returns to the HP position, it is detected by the HP sensor mounted on
the right end of the Top Frame, and the information is fed back to the IC2 gate array (E05B33CB). Figure
2-4 illustrates the CR mechanism conception.
The CR motor, which drives the CR mechanism, is a 4-phases/200-pole/HB type stepping motor and is
controlled by the constant current bipolar control system. The current control signal for each phase and
phase control signal output from the IC2 gate array E05B33CB are converted into the CR motor control
signal by the IC13 bipolar driver UDN2917EB to control the CR motor. Refer to Table 2-2 and Table 2-3
which show the CR specification and the drive frequency.
Item Description
Motor type 4-phases / 200-pole / HB type stepping motor
Drive voltage
42 VDC
±
5%
Coil resistance
7.8
Ω ±
10% (at 25
°
C per 1 phase)
Inductance
14 mH
±
20% (1 KHz, 1 Vrms)
Drive frequency 240 ~ 4080 Hz
Excitation mode Bipolar drive
Minimum step 1/120 inch / pulse (2-2 phase drive), 1/240 inch / pulse (1-2 phase
drive)
1-480 inch / pulse (W1-2 phase drive)
Mode CR speed
(CPS)
Drive
frequency
Drive system and acceleration/deceleration
step
Acceleration/
De celeration
(Hz) A*
2
:1, D*
3
:2 A:2, D:2 Constant pulse*
1
Fast skip 340 4080 64 (W1-2) 164 (2-2) (2-2) 180
DRAFT 266.7 3200 88 (W1-2) 86 (2-2) (2-2) 108
LQ 200 2400 432 (W1-2)

(W1-2) 108
TEXT LQ 200 2400 240 (W1-2)

(W1-2) 60
SLQ 100 1200 432 (W1-2)

(W1-2) 108
Capping 90 1080 64 (W1-2)

(W1-2) 16
wiping 2 80 960 64 (W1-2)

(W1-2) 16
Wiping 40 480 16 (W1-2)

(W1-2) 4
Capping
(open) 20 240 8 (W1-2)

(W1-2) 2
Constant
value 20 240
 
(W1-2)

Note) *1: Step : reduced to 2-2 phase
*2: Acceleration
*3: Deceleration
Timing Belt
Sub Pulley CR Guide Shaft
HP Sensor
CR Motor
CR Motor Pinion Gear
CR Unit
Figure 2-4. Carriage Mechanism
Table 2-2. CR Motor Specification
Table 2-3. CR Motor Drive Terms