Carriage Mechanism; Carriage Movement Mechanism - Epson Stylus Pro 3800 Service Manual

Epson Stylus Pro 3800/3800C/3850/3880/3885/3890

2.5 Carriage Mechanism

The carriage mechanism consists of a carriage movement mechanism, platen gap
adjustment mechanism, and carriage lock mechanism. For explanation about the
carriage lock mechanism, refer to Cap Unit/Carriage Lock

2.5.1 Carriage Movement Mechanism

Carriage movement mechanism consists of a carriage unit, CR motor, timing belt,
carriage guide shaft, CR scale, and CR encoder.
Rotational drive of the CR motor is transmitted to the carriage unit through the timing
belt, and the carriage unit moves left and right along the carriage guide shaft. The CR
encoder installed on the back of the carriage unit reads the jagged surface of the CR
scale and sends the read value to the main board. Position and moving speed of the
carriage unit are controlled based on the read value.
OPERATING PRINCIPLES
(p.44).
Carriage Mechanism
CR Scale
CR Scale
Carriage Unit
Figure 2-15. Carriage Movement Mechanism
Revision C
CR Encoder
CR Timing Belt
CR Motor
Carriage Guide Shaft
46