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Epson WF-C579, WF-C529 Printhead Operating principles

May 20, 2021 by dangnam69 2 Comments

Epson WF-C579, WF-C529 Printhead Operating principles

Overview

EPSON WF-C579R/WF-C579Ra/WF-C529R employs the μTFP4 head.
The μTFP4 head features dense nozzle pitches (600 dpi). In addition, the number of nozzles per row is also greater with the row length of 1.33 inches.
These features contribute to higher image quality and faster printing by increasing both the quantity and the density of ink droplets per shot.
The following table lists the Printhead specifications.

Epson-WF-C579R-C579Ra-C529Ra-printhead-appearance.jpg

  • Printhead type: μTFP4
  • Color: Black (B: 2 row), Cyan (C: 2 row) Magenta (M: 2 row), Yellow (Y: 2 row)
  • Number of nozzles:  3200 nozzles (400 nozzles per row)
  • Nozzle pitch: 0.042 mm (1/600 inch)

The nozzle layout as seen from behind the Printhead is shown below.

Epson-WF-C579R-C579Ra-C529Ra-nozzle-layout.jpg

This product uses off-carriage type ink supply mechanism. Therefore, the Printhead is equipped with self-sealing valves (1) so that the amount of ink fired from the Printhead is not affected by variation in pressure inside the ink path caused by movements of the carriage or ink supply operations.

(1) This valve opens only when the pressure of the output side drops below a specified value. Because of this characteristic of the valve, pressure variation in the input side does not affect the output side.

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

— Epson WF-C579R, WF-C579Ra, WF-C529R Structure and Configuration, click here

Epson WF-C579, WF-C529 Head Angular Mecha Adjustment

This section explains the head angular mecha adjustment for adjusting the inclination of the Printhead on the CR Unit physically

Overview

As for the nozzle arrangement of the μTFP4 head mounted on this printer, the nozzles of the same color are not arranged next to each other. Therefore, the influence of the posture (inclination) of the Printhead of this printer on the print quality is great.

The inclination of the Printhead of this printer is corrected with software (the adjustcorrected) and mechanically by adjusting the head angular adjustment dial mounted on the carriage mechanism. The rotational amount of the adjustment dial is determined based on the result of visual check of the printed adjustment pattern.

Epson-WF-C579R-C579Ra-C529Ra-Inclination-of-Printhead.jpg

In this adjustment, the inclination of the Printhead is defined as the amount of misalignment of the nozzles on row H and the center points of the spaces between the nozzles on row A (shown in Figure above) The purpose of the adjustment is to eliminate the misalignment (the inclination of the Printhead) completely.

Range of adjustment

Epson-WF-C579R-C579Ra-C529Ra-Head-angular-mecha-adjustment.jpg

By rotating the head angular adjustment dial, the Printhead is rotated on the pivot point on the bottom. The relationship between the rotational direction of the Head Angular Adjustment Dial and that of the Printhead is as follows.

The resolution performance of the Head Angular Adjustment Dial is approximately 12 μm, and adjustable up to ± 144 μm.

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

— Contact us for more information, click here

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Tagged With: configuration, Epson WF-C529R, Epson WF-C579R, Epson WF-C579Ra, Operating principles

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