Epson STYLUS 3000 Service Manual

Operating Principles
Rev. A
2-
4
2.2.3 Carriage (

) Mechanism
The  mechanism is composed of the  unit, timing belt,  guide shaft, paper eject frame,  (Home
Position) sensor and  motor. The  motor sends torque to the timing belt to move the  unit in the
both right and left directions along the paper eject frame and  guide shaft. A stepping motor used for
the  motor enables the  unit to move and stop at any position. The  is primarily detected at the
home position by the  sensor when the printer is turned on and its position is then controlled by the
open loop. Table 2-2 and Table 2-3 show the specification for the  motor and the  motor drive terms,
respectively.
Item Description
Motor type 4-phases / 200-pole / Hybrid type stepping motor
Drive voltage
42 VDC ± 5% (The voltage applied to the driver)
Coil resistance
5 Ω ± 7% (at 25° C per 1 phase)
Excitation mode  Bipolar drive
 2-2 phase, 1-2 phase,  1-2, 2  1-2 phase, 4  1-2 phase
 Constant current drive
Drive frequency 480 to 9600 Hz
Minimum step 0.202 mm (2-2 phase drive)
0.106 mm (1-2 phase drive)
0.053 mm (  1-2 phase drive)
0.026 mm (2  1-2 phase drive)
0.013 mm (4  1-2 phase drive)
Print
mode
Print speed Acceleration
1
Acceleration
2
Constant Deceleration
1
Deceleration
2
Draft 400 cps 0.91 0.91 0.63 0.91 0.91
LQ 200 cps 0.91 0.91 0.49 0.63 0.63
SLQ 100 cps 0.63 0.63 0.49 0.63 0.63
Table 2-1.

Motor Specification
Table 2-2. CR Motor Drive Terms
CR Unit
Timing Belt
Sub Pulley
CR Motor
Pulley
HP Sensor
CR Guide Shaft
Paper Eject Frame
Figure 2-4. CR Mechanism

Epson STYLUS 3000 Specifications

General

Brand	Epson
Model	STYLUS 3000
Category	Printer
Language	English