Epson Stylus Color 1160 - Overview; Printer Mechanism

EPSON Stylus COLOR 860/1160 Revision C
Operating Principles Overview 29
2.1 Overview
This section describes the operating principles of the printer mechanism and
electrical circuit boards. The EPSON Stylus COLOR 860/1160 has the
following boards:
o Main board: C298MAIN Board (Stylus COLOR 860/1160)
o Power supply board: C298PSB/PSE Board (Stylus COLOR 860/1160)
o Panel board: C298PNL Board (Stylus COLOR 860)
C304PNL Board (Stylus COLOR 1160)
2.1.1 Printer Mechanism
Unlike other EPSON ink jet printers, the Stylus COLOR 860/1160 uses DC
motor for power source. Use of the DC motor enable the printer to lower noise
during printing to a great extent. Table 2-1 shows the various motor types used
in the printer and their applications.
Table 2-1. Motor Types and Corresponding Applications
The basic structure of the printer mechanism is mostly common to the Stylus
COLOR 400/600/440/640/740, except that the Stylus COLOR 860/1160 uses a
Pump/ASF motor. With this motor equipped, the paper loading mechanism and
the pumping mechanisms are independently driven, which allows the printer to
offer higher throughput as a result.
Figure 2-1 shows the printer mechanism block diagram for the Stylus COLOR
860/1160.
Figure 2-1. Printer Mechanism Block Diagram
Motor Name Type Application / Feature
CR Motor DC with brush
Used to drive the carriage making little noise. A
a linear scale is used to monitor the motor’s
operating condition.
PF Motor DC with brush
• Drives paper feeding rollers used to send
paper at specified speeds and load/eject
paper.
• CR lock lever operation
• To monitor paper feeding pitch, a loop scale
is attached beside the high-precision gear.
Pump/ASF
4-Phase 48-pole
stepping motor
Like the Stylus COLOR 800 and Stylus Pro
5000, this motor manages pump drive and
paper loading from ASF.
Since this is a stepping motor, it has no scales
or photo sensors that are used to monitor the
motor’s operating condition.
Plain Gear
PF Motor Pinion
PF Motor
Flashing Window
(at 80th or 136th column)
Photo Interrupter
(Encoder for CR)
Star Wheel Roller
Bk I/C Sensor
Loop Scale
PF Drive Gear
ASF Sensor
Detector Wheel
Loading Shaft
Loading Rollers
PE Sensor
Pump/ASF Motor
(stepping motor)
CR Motor (DC motor)
PG Lever
Liner Scale
PF Roller
CR Guide Shaft
Pump Unit
Cap Unit
(without a valve)
Timing Belt
Printhead (one unit)
Carriage Unit
CMY I/C Sensor
Encoder (PF)