Epson ME100, Service Manual

Page: 34 / 135

EPSON Stylus CX1500/ME100 Revision A
OPERATING PRINCIPLES Overview 34
2.1.3 Carriage Mechanism
The Carriage Mechanism consists of CR Motor, Carriage Unit (including the Print
Head), Timing Belt and CR Home Position Sensor (HP/PE Sensor) etc. Following
figure shows you each component for the CR mechanism.
Figure 2-5. Carriage Mechanism (Top view)
The following stepping motor controls the CR mechanism on this printer.
The drive of the CR Motor is transmitted to the Carriage Unit via the Timing Belt.
And, the CR Home Position is detected with the HP/PE Sensor. This sensor is available
as the CR Home Position Sensor while the CR Motor operates in each sequence. (The
function of this sensor varies depending on the running condition of the motors. It is
available as the PE Sensor when the PF Motor operates in each sequence.)
When the detection plate molded on the Carriage Unit pushes down the HP Detection
Lever and the CR home position is detected with HP/PE Sensor, HIGH signal is output
to the CPU.
.
Figure 2-6. CR Home Position Detection
For your reference, in case that the CR home position is not detected with the HP/PE
Sensor although the Carriage Unit moves correctly, the printer indicates the “Fatal
error”. And also, in case that the Carriage Unit cannot move outside the home position
and the CR home position is not detected with the HP/PE Sensor, the printer indicates
the “Paper jam error”.
Table 2-1. Carriage Motor Specification
Items Specifications
Type 4-Phase/ 48-Poles PM Stepping motor
Drive Voltage +35.9V ± 5% (DRV IC voltage)
Coil Resistance 11.5
Ω
± 10% (per phase at 25 degrees)
Inductance 15mH ± 20% (1KH 1Vrms)
Drive Method Bi-Polar drive
Driver IC A6615
Carriage Unit
Timing Belt
HP/PE Sensor
CR Motor
HP Detection Lever
Right side view
CR HP Detection Plate
HP Detection Lever
Low signal
HP Detection Lever
CR HP Detection Plate
High signal