EPSON Stylus PHOTO 810/820/830

Revision B

2.1.4 Paper Loading/Feeding Mechanism

The following stepping motor controls the Paper loading/feeding mechanism on this printer.

 

Table 2-2. PF motor specifications

 

 

Item

Description

 

 

Motor type

4-Phase/ 96-Poles PM Stepping motor

 

 

Drive voltage

+42 V +/ - 5% (DRV IC voltage)

 

 

Coil Resistance

6 Ω +/ - 10% (per phase at 25 degrees) (Stylus Photo 810/820)

5.4 Ω +/ - 10% (per phase at 25 degrees) (Stylus Photo 820/830)

 

 

 

Inductance

9.5 mH +/ - 20% (1kH 1Vrms) (Stylus Photo 810/820)

8.2 mH +/ - 20% (1kH 1Vrms) (Stylus Photo 820/830)

 

 

 

Driving method

Bi-Polar drive

 

 

Driver IC

LB1946 (Stylus Photo 810/820) / A6615 (Stylus Photo 820/830)

 

 

The drive of the PF motor is transmitted to the LD roller shaft and the PF roller through gears for the Paper loading/feeding mechanism. The Paper loading mechanism plays a role in loading a paper from the ASF unit to the PF roller. And also, the Paper feeding mechanism plays a role in feeding a paper loaded from the ASF unit. The functions of the Paper loading/feeding mechanism varies depending on the rotational direction of the PF motor as the table below.

Table 2-3. ASF unit function & PF motor rotational direction

Directions *2

 

Corresponding functions

Clockwise

• Release the Change lever from the Clutch mechanism

 

 

 

Counterclockwise

Pick up and feed a paper

Set the Change lever on the Clutch mechanism

 

 

 

 

*2 : The PF motor rotation direction = seen from the left side of the printer.

Following shows you the transmission path of the PF motor drive to the LD roller, the PF roller and the Paper eject roller. (The numbers in the following figure show you the order of transmission path.)

 

Left side view

 

 

Right side view

 

 

 

HP/PE sensor

 

 

Spur gear

 

 

 

PF roller

 

 

 

Detect a

Spur gear 60

Spur gear 60

Spur gear 10,8

 

35.2

No paper

(PF roller)

(Paper eject roller)

 

 

paper

(PF roller)

 

 

 

 

 

 

 

 

6

 

 

1

1

1

 

5

 

 

 

 

 

Paper

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

Paper eject roller

Combination

3

Combination

 

 

 

gear 16.32

PE detection

 

PF motor

gear 18.28

 

 

 

 

Spur gear 27.2

 

Spur gear 25.6

lever

 

PF motor pinion gear

 

 

 

 

 

 

Low signal

High signal

Note: The Clutch gear is molded on the backside of the Spur gear 35.2 such as Combination gear.

Figure 2-7. Paper loading/feeding mechanism

Operating Principles

Overview

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