Carriage Mechanism - Epson LQ-1050 Technical Manual

2.1.2.2 Carriage Mechanism

Carriage mechanism
Figure 2-4 shows the carriage mechanism. The printhead is mounted on the carriage, and the entire
unit is supported by the two carriage
and is moved when the carriage motor drives the timing belt. A four-phase 200-pole hybrid type stepper
motor is used for this operation.
Motor phase drive signals are generated by the control circuit and converted into motor drive voltages
in the motor drive circuit to rotate the carriage motor by driving phases A to D of the motor.
Printing is performed by a combination of printing and carriage mechanism operations.
The print start position is determined by the home position sensor when the mechanism is initialized.
Details are provided in Section 2.3.7.
Table 2-3 lists the specifications of the carriage mechanism.
Type Number of
step
200
Hybrid
stepper
motor, 4
phases
guide shafts.
Fig. 2-4. Carriage Mechanism
Table 2-3. Carriage Mechanism Specification
Carriage Motor
Drive Voltage [V]
Hold Run
5 35
The carriage is fixed to the timing belt on one side
Driving
Method
Control
Method
Open loop Timing belt
2-5
Carriage
Sensor
Movement
Per Step
["/step]
2 0 Home
1/1
position
Platen gap