Carriage Movement Mechanism - Epson LQ-300 Service Manual

Operating Principles

2.1.2 Carriage Movement Mechanism

The carriage movement mechanism consists of the carnage assembly, CR motor, timing belt, driven
pulley, HP sensor, etc. The CR motor drives the tirnkigbelt. The carnage assembly is connected to
the timing belt, which is moved by the CR motor. Figure 2-2 shows the carriage movement
mechanism.
The printer detects tie carriage home position with the HI? sensor. This sensor is the basis for
position. The sensor is ON, when the carriage is pushed to the right or left. The striker on the
carriage actives the sensor to indicate the carriage home position, which toggles the sensor to OFF.
Table 2-1. CR Motor Assembly Specifications
I
Category
Type
Drive Voltaae
Drive Pulse Frequency
Excitation Method
Figure 2-2. Carriage Movement Mechanism
2-2
I
Requirement
4-phase, 96-pole, HB-type stepping motor
31.5 -38.5 VDC
I
1 9 . 6 Q * 8 % (Der Dhase, at25° C,770 F) I
Normal Mode Draft
Color Mode LQ
Constant-voltage 2-2 phase excitation
1-2 phase excitation
I
2400
1600
DDS