Epson Stylus Photo RX700 - PE Detector; Transmission Path of Driving Force for Paper Feed

EPSON Stylus Photo RX700 Revision A
Operating Principles Mechanism Operating Principles 27
2.2.4.3 PE Detector
 Function : • Detection for paper positioning control
• Detection of the paper tail end
 Detector specifications
 Recognition of the change of the PE signals:
The recognition during driving of the ASF Motor is such that the signal is read and
judged immediately (within 100 µs) after phase switching.
NOTE: Once “no paper” has been detected during driving of the PF Motor,
paper detecting operation does not take place during paper feeding by
the PF Motor until paper ejecting operation is completed.
2.2.4.4 Transmission Path of Driving Force for Paper Feed
Flowchart 2-1. Transmission Path of Driving Force from the PF Motor
Figure 2-15. Transmission Path of Driving Force from the PF Motor
Item Specifications
Detection method Photo-electric conversion system (transmissive type) SHARP GP1S94
Electrical
characteristics
Open-collector Collector withstand voltage 30 V or below
Sink current 0.3 mA or below
Drive voltage 1 3.3 V ± 5%
Drive voltage 2 3.3 V ± 5%
Detected Condition Switch Mode Detector Output
There is no paper
Closed 2.4 V or above
There is paper
Open 0.4 V or below
Epicyclic Gear 12
No transmission during
CCW rotation
PF Roller Assy
PF Motor
Composite Gear 12, 10 Front Paper Eject Roller Shaft
Spur Gear 15.5
Idle Roller Shaft Assy
Rear Paper Eject Roller Shaft
Transmission Gear 12 EJ Transmission Gear B
See Flowchart 2-1.(p.32)
PF Motor
PF Roller Assy
EJ Transmission Gear B
Front Paper Eject Roller Shaft
Spur Gear 15.5
Rear Paper Eject
Roller Shaft
Idle Roller Shaft Assy
During CW rotation, the Epicyclic Gear
Holder turns clockwise, and the Epicyclic
Gear and Idle Roller Shaft Assy are engaged
to transmit driving force.
Idle Roller Shaft Assy
PF Roller Assy
Transmission
Gear 12
Composite Gear 12, 10
Epicyclic Gear 12
Epicyclic Gear Holder
Engaged
Disengaged
(Transports the front-
loaded paper)