Carriage Mechanism - Epson Stylus C50 Service Manual

EPSON Stylus C50/C60/C61/C62

2.1.3 Carriage Mechanism

The Carriage mechanism consists of CR motor, Carriage unit (including the Printhead
and CR guide shaft), CR timing belt and CR home position sensor (HP/PE sensor) etc.
Following figure shows you each component for the CR mechanism.
HP detection lever
CR unit
Figure 2-6. Carriage mechanism (Top view)
The following stepping motor controls the CR mechanism on these printers.
Table 2-1. Carriage motor specification
Items
Type 4-Phase/ 200-Poles HB Stepping motor
Drive Voltage
7.8 Ω +/ - 10% (per phase at 25 degrees)
Coil Resistance
Inductance
Drive Method
Driver IC
Operating Principles
HP/PE sensor
CR motor
CR guide shaft CR timing belt
Specifications
+42 V +/ - 5% (DRV IC voltage)
14 mH +/ - 20% (1KH 1Vrms)
Bi-Polar drive
LB1946 (Stylus C50/C60)
A6615 (Stylus C61/C62)
The drive of the CR motor is transmitted to the CR unit via the CR 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 CR 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.
HP detection lever
CR HP detection plate
Figure 2-7. CR home position detection
Moreover, like the previous printers (Stylus COLOR 480/580), these printers do not
also have the PG adjustment mechanism. Therefore, the CR guide shaft is assembled
with the defined PG value (1.7 ± 0.2 mm).
For your reference, in case that the CR home position is not detected with the HP/PE
sensor although the CR unit moves correctly, the printer indicates the "Fatal error".
And also, in case that the CR 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".
Overview
Revision C
.
Right side view
CR HP detection plate
HP detection lever
Low signal High signal
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