Carriage Drive Mechanism; Table 2-1. Carriage Motor Specifications; Table 2-2. Drive Terms (Carriage Drive Mechanism); Figure 2-5. Carriage Movement Mechanism - Epson Stylus 1500 Service Manual

Operating Principles

2.2.3 Carriage Drive Mechanism

The timing belt attached to the base of the carriage unit is driven by the carriage motor, causing the
carriage unit to move along the carriage guide shaft from left to right or vice versa. The carriage drive
motor in this printer is a 4-phase, 96-pole, hybrid-type stepping motor, allowing the printer to stop the
carriage or change the carriage movement at any position. The carriage position is recognized by the
home position (HP) sensor, and position information is fed back to the CPU. This carriage motor is
driven by the SLA7043M motor driver IC.
Item
Motor type
Drive voltage
Coil resistance
Drive frequency
Excitation mode
Minimum step

Table 2-2. Drive Terms (Carriage Drive Mechanism)

Print
Mode
Print
Speed
(cps)
^
Draft (black)
400
Draft (color)
LQ
200
SLQ
100
Driven Pulley
Eject Paper Frame

Figure 2-5. Carriage Movement Mechanism

2-4

Table 2-1. Carriage Motor Specifications

4-phase / 96-pole hybrid-type stepping motor
+42 VDC
5 7 %
480 - 9600 Hz
Constant current unipolar drive
0.026 mm (at 2W1-2 phase)
0.106 mm (at 1-2 phase)
Current Value (A / Phase)
Acceleration
1 / 2
0.8 / 0.8
0.9 / 0.9
0.9 / 0.9
0.9 / 0.9
Carriage Unit
Timing Belt
CR Guide Shaft
Stylus 1500 Service Manual
Description
5%
Deceleration
Constant
1 / 2
0.7 0.96 / 0.96
0.7 0.8 / 0.8
0.6 0.8 / 0.8
CR Motor
HP Sensor
+
Rush
(before/after)
0.5 / 0.5
^
0.5 / 0.5
0.5 / 0.5
Drive Pulley
Rev. A