Epson WF-C579, WF-C529 Paper Loading, Paper Feed mechanism

This section is sharing the knowledge about the Epson WF-579R, WF-579Ra, WF-529R Paper Feed mechanism. This section is long enough that would have 2 posts about details of mechanism.
– Epson WF-C579, WF-C529 Paper Loading, Paper Feed mechanism details steps, click here

Paper Loading/Paper Feed mechanism

Overview

The components of the paper loading mechanism and the loading method are as follows.

– Standard Cassette (Paper Cassette 1):

•  Power source: ASF Motor
•  Control:  ASF Encoder/ASF Scale
• Function: 
  •  Drives the Pickup Roller, loading paper from the Standard Cassette.
  •  Paper loaded from the Cassette is fed to the PF Roller using the Middle roller of the Rear unit.

– Optional Cassette (Paper Cassette 2):

•  Power source:
  •  ASF Motor (optional cassette)
  •  Lift Motor
  •  ASF Motor
• Control:
  • ASF Encoder/ ASF Scale (optional cassette)
  • Lift Phase Sensor
  • ASF Encoder/ASF Scale
• Function: 
  • ASF Motor (Optional Cassette):
    •  Drives the Pickup Roller, loading paper from the Optional Cassette.
    •  Drives the Vertical Feed Roller and the feed roller of the Ink Supply Unit, feeding the paper to the Middle Roller of the Rear
      Unit.
  • Lift Motor: Drives the lift-up mechanism, raising the paper set on the Optional Cassette up to the paper pick-up position.
  •  ASF Motor:  Paper loaded from the optional cassette is fed to the PF Roller using the Middle Roller of the Rear Unit.

– Rear paper loading:

• Power source: ASF Motor
• Control: ASF Encoder/ASF Scale
• Function: Drives the LD Roller and Hopper of the Rear ASF Assy, loading paper from the Rear ASF Assy

– Paper feed:

• Power source: PF Motor
• Control: PF Encoder/PF Scale
• Function: Drives the PF Roller/EJ Roller, loading and outputting paper.

— More information about Epson WF-579R, WF-579Ra, WF-529R Operating Principles, click here

— Epson WF-C579, WF-C529 Printhead Operating principles, click here

Paper Loading/Feed Path

Feeding rom the Paper Cassette 1

1. When you set Paper Cassette 1 in the printer, the Cassette Hopper is lifted up by the pickup mechanism provided in Paper Cassette 1. The paper set in paper cassette 1 is lifted up by the Cassette Hopper, and comes in contact with the Pickup Roller.
2. The ASF Motor is driven, and the Pickup Roller conveys paper to the Separation Roller. The paper conveyed to the Separation Roller is
   separated from the second paper by the Separation Roller and Retard Roller, and is conveyed to the Middle Roller after passing through the position where paper is detected by the Feed Sensor.
3. The paper conveyed to the Middle Roller is conveyed by the Middle Roller up to the position where paper is detected by the PE Sensor.
4.  When the PE Sensor detects the paper, skew removal is performed in accordance with the printing conditions. After the completion of skew removal, the paper is conveyed to the printing start position by the PF Roller, and printing starts.
5.  After the completion of printing, the paper is extracted by the PF Roller and EJ Roller.

— Epson WF-C579, WF-C529 Carriage Mechanism, click here

Feeding from the Rear ASF Assy

1.  When printing is performed from the rear paper feed device, the drive transmission of the ASF Motor is switched by the Rear ASF Solenoid, and the LD Roller rotates by the ASF Motor.
2.  The paper set in the Hopper is conveyed to the Middle roller by the hopper up action of the Hopper and LD Roller.
3.  The paper conveyed to the Middle Roller is conveyed by the Middle Roller to the position where paper is detected by the PE Sensor, and printing is performed in the same way as the Front Cassette.

Feeding from Optional Cassette (Paper Cassette 2)

1.  The drive of the Lift Motor is transferred to the optional hopper-up mechanism parts, which lifts up the Optional Cassette Hopper, and the paper set in Paper Cassette 2 comes in contact with the Optional Pickup Roller.
2.  The ASF Motor is driven, and the Optional Pickup Roller conveys paper to the Optional Separation Roller. The paper conveyed to the Optional Separation Roller is separated from the second paper by the Optional Separation Roller and Optional Retard Roller, and is conveyed to the Vertical Feed Roller.
3.  The paper conveyed to the Vertical Feed Roller is passed through the Optional Feed Sensor by the Vertical Feed Roller and is conveyed up to the feed roller of the Ink Supply Unit. And then the paper is conveyed by the feed roller of the Ink Supply Unit up to the position where it is detected by the Feed Sensor of the printer.
4.  When the Feed Sensor detects a paper, the ASF Motor is driven, the paper is conveyed by the Middle Roller up to the position where it is detected by the PE Sensor, and printing is performed in the same way as the front cassette paper feeding.

— Epson WF-C579, WF-C529 printer’s Other Motor and Sensors, click here

— Epson WF-C579, WF-C529 printer’s Sensors, click here

Feeding path during the Automatic Duplex Printing

– When automatic duplex printing is performed, an automatic judgment function for the drying time of the printed surface after surface printing is provided in order to avoid friction of the printed surface. If drying is determined to be necessary after surface printing, two-stage printed surface drying wait is performed at two locations, namely on the Stacker (when the paper is held by the PF Roller and the Driven Roller) and inside the Rear Unit (when the Middle Roller has held the end of the paper).

– In this product, the temperature and humidity of the operating environment is detected by loading a Temperature and Humidity Sensor, and the throughput is improved by setting an appropriate drying time in accordance with the operating environment.