Epson Stylus Photo R800 - Chapter 5 ADJUSTMENT; Paper Loading Mechanism

EPSON Stylus Photo R800 Revision A
OPERATING PRINCIPLES Printer Mechanism 24
2.2.4 Paper Loading Mechanism
The Paper Loading Mechanism is designed to transfer the paper fed from the
ASF, Roll Paper Guide or Board Paper Guide or the CD-R fed from the CD-R
Tray according to the print data.
2.2.4.1 Paper Loading Mechanism
The following indicates the paper loading driving DC motor specifications.
Like the CR Motor, a DC motor is used as the PF Motor in this product.
Closed loop control based on the DC Motor and Rotary Encoder has the
following advantages.
 Improved paper feed accuracy
 Paper feed amount control
The driving force of the PF Motor is transmitted to the PF Roller and Paper
Eject Roller in the following path.
 PF Roller Drive Transmission Path
PF Motor Pinion Gear
⇒ PF Timing Belt ⇒
Combination Gear 36.294, 45.5 ⇒ PF Roller Shaft
 Paper Eject Roller (front) Drive Transmission Path
PF Motor Pinion Gear
⇒ PF Timing Belt ⇒
Combination Gear 36.294, 45.5 ⇒ Spur 31.5 ⇒ Spur 54 ⇒
Paper Eject Roller (front)
 Paper Eject Roller (rear) Drive Transmission Path
PF Motor Pinion Gear
⇒ PF Timing Belt ⇒
Combination Gear 36.294, 45.5 ⇒ Spur 31.5 ⇒ Spur 54 ⇒ Spur 18 ⇒
Spur 15.5
⇒ Spur 18 ⇒ Paper Eject Roller (rear)
The following shows the part names and outline of the drive transmission path.
Paper is transferred in the above driving force transmission path.
Figure 2-7. Paper Loading Mechanism 1
Table 2-6. PF Motor Specifications
Item Specifications
Type DC motor with brushes
Drive voltage +42V ± 5% (voltage applied to driver)
Winding resistance 22.3Ω ± 25%
Inductance 17.3mH ± 25%
Drive method PWM
Drive IC A6615
Front Paper
Guide
PF Roller
PF Motor
Paper Eject
Roller (front)
Pinion Gear
PF Timing Belt
Combination Gear
36.294, 45.5
Spur 31.5
Spur 54
Spur 18
Spur 15.5
Spur 18
Paper Eject
Roller (rear)
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