EPSON Stylus PHOTO 810/820/830

Revision B

When the PF motor pinion gear rotates CW direction (Right side view), the Change lever pushes down the Clutch lever as right figure and the Clutch lock tooth is disengaged from the Clutch gear. As the result, the LD roller shaft dose not rotate at all because the drive of the PF motor is not transmitted. In this time, the ASF hopper is also pushed down by the ASF hopper release lever on the LD roller shaft, and the Paper return plate is set to avoid that papers are slipped down from the paper set position.

This position is the ASF home position.

Step 1 (ASF Home position)

Hopper & Paper return plate condition

LD roller shaft

LD roller

 

 

 

ASF hopper

 

 

release lever

Paper return plate

 

Hopper

Torsion spring 29.1

 

Compression

ASF frame

 

spring 2.50

 

 

Gear rotation direction (Right side view)

Spur gear 10.8

Change lever

Clutch lock tooth

(PF roller)

 

 

Clutch lever

 

Clutch

Clutch gear

 

<PF motor drive transmission path for ASF home position setting>

PF motor pinion gear (CW) → Spur gear 10.8 (PF roller) (CCW) →

Combination gear 18.28

(CW) → Spur gear 27.2 (CCW) →

Spur gear 25.6 (CW) →

Change lever (CW) →

Combination gear 16.32

(CCW) → Spur gear 35.2 (CW)

* Above transmission pass = seen from the right side of the printer

Step 2

Hopper & Paper return plate condition

Gear rotation direction (Right side view)

To Front side

Clutch lock tooth

Tension spring 0.143 Clutch gear

<PF motor driver transmission path for Clutch lever release>

PF motor pinion gear (CCW) → Spur gear 10.8 (PF roller) (CW) →

Combination gear 18.28

(CCW) → Spur gear 27.2 (CW) →

Spur gear 25.6 (CCW) →

Change lever (CCW) →

Combination gear 16.32

(CW) → Spur gear 35.2 (CCW)

* Above transmission pass = seen from the right side of the print

When a paper is loaded from the ASF unit, the Change lever moves to the front side of the printer with the CCW rotation (right side view) of the PF motor pinion gear and releases the Clutch lever. As the result, the Clutch turns back to the engagement position by the tension force of the Tension spring 0.143. And, the Clutch gear is engaged with the Clutch lock tooth to transmit the drive of the PF motor as left figure. In this time, the Change lever is locked instantaneously by the protrusion on the backside of the CR unit to change over from the ASF home position detection function to the paper loading function surely.

Figure 2-8. ASF paper loading sequence (Step 1, 2)

Operating Principles

Overview

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