Epson Stylus Photo R800 - 2.2 Printer Mechanism

EPSON Stylus Photo R800 Revision A
OPERATING PRINCIPLES Overview 16
2.1 Overview
This chapter explains the operating principles of the mechanical sections and
electrical circuits in this product. The main components of this product are as
follows.
 Control circuit board : C550 MAIN
 Power supply circuit board : C550 PSB/PSE
 Control panel board : C550 PNL
2.2 Printer Mechanism
Like the conventional model, this product uses DC motors as power sources.
The following table describes the motor types and their applications.
The basic structure of the mechanism has the following features.
 The sensor dedicated to Auto Bi-D adjustment and auto nozzle check is
installed.
The following shows the outline of the printer mechanism.
Figure 2-1. Printer Mechanism Outline
Table 2-1. Various Motors
Motor Name Type Applications/Functions
CR Motor
DC motor with
brushes
Used for carriage driving. Makes little noise
during driving. The CR linear scale and CR
encoder sensor are used to control the motor.
PF Motor
DC motor with
brushes
Power source to drive the Paper loading rollers
at the time of fixed-value paper loading or paper
feed/eject operation. To grasp the paper feed
pitch, the precision gear surface is fitted with the
PF scale and the PF encoder sensor is used to
control the motor.
APG Motor
DC motor with
brushes
Power source to drive the Carriage Unit at the
time of PG setting. The two APG Sensors and
Carriage Shaft are driven vertically to control the
motor.
ASF Motor
4-phase, 48-pole
PM type
stepping motor
Performs the paper feed operation of the ASF.
Because of a stepping motor, this motor does
not require a scale, photo sensor and like to be
fitted to grasp the driving conditions.
Pump Motor
4-phase, 48-pole
PM type
stepping motor
Drives the pump, wiper, etc. of the Ink System.
Because of a stepping motor, this motor does
not require a scale, photo sensor and like to be
fitted to grasp the driving conditions.
LD Roller
Timing Belt
CR Encoder
Sensor
ASF Motor
Ink System
Unit
Pump Motor
PE Sensor
Ink Mark
Sensor
PW Sensor
Paper Eject
Roller (front)
PG Release
Sensor
PF Motor
APG Motor
APG Sensors
CR Scale
PF Encoder
Sensor
PF Scale
Retard
Roller
PF Roller
Carriage
Unit
Carriage
Shaft
CR Motor
Paper Eject
Roller (rear)
Download Service Manual And Resetter Printer at http://printer1.blogspot.com