EPSON Stylus PHOTO RX600/610, RX620/630 Revision C

Operating Principles Mechanism 15

2.2.1.1 Carriage Motor Specification2.2.1.2 Printerhead Specification
Black Ink : 90 nozzles
Color Ink : 90 nozzles x 5 colors (C, M, Y, LC, LM)
2.2.1.3 Paper Feeding Motor Specification2.2.1.4 PW Detector Specification
Stylus PHOTO RX600/610, RX620/630 has newly employed a PW (Paper Width)
sensor that is described in detail below.
Purpose of Detection
•To prevent printing with no characters on cut sheet.
Detector Specification
Switching Mode
Note: Paper head signals shall be converted by means of 8-bit A/D conversion.
PW Detector Control
There are two controlling methods using PW detector as follows:
Control of preventing print with no characters
Before start of print (immediately after paper head feed is complete) or during
print, this control detects the existence of paper with PW detector, driving CR
and PF motors and prevents print with no characters on paper sent to paper
guide, which applies to only right and left edges of paper.
Control of restriction to run-off
This control detect paper edges with PW detector at the time of printing with
no margin, and restrict the printing run-off quantity. It detects 4 edges when
no margins are set for 4 sides of paper. For each mode, run-off area thin-out
control is set that further compensates for run-off mask area at the time of
printing with no characters.
Table 2-1. CR Mo tor Specification
Item Specifications
Type DC Motor with brush
Voltage + 42V (DC) ±5% (printable voltage to the driver)
Resistance 22.65 Ω ± 10%
Inductance 17.3 mH ± 25%
Drive PWM system, rated current chopping system
Drive IC A6615
Table 2-2. PF Motor Specification
Item Specifications
Type 4-phase 200-pole HB stepping motor
Voltage + 42V (DC) ±5% (printable voltage to the driver)
Resistance 30 Ω ± 10%
Inductance 3.5 mH ± 20%
Drive Bipolar driving
Drive IC A6615
Item Specification
Detecting method Photoelectric conversion method (reflection type)
(SHARP GP2S40V)
Open-collector
electric characteristic
Collector withstand-voltage: not more than 30V
Sinc current : not more than 0.2mA
Driving voltage : 3.3 ± 5%
Detected State Switching Mode Detector Output
Paper existent Open Voltage low
Paper non-existent Close Voltage high