# Printhead

This product employs the μTFP-2Chip head.

The μTFP-2Chip head features dense nozzle pitches (600 dpi); denser than the traditional heads. 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.

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

This product uses off-carriage type ink supply mechanism.

Therefore, the Printhead is equipped with self-sealing valves 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.

(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.)

#Head angular mecha adjustment

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

The nozzle arrangement of the μTFP-2Chip head mounted on this printer differs from that of the traditional printers. 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 greater than that of the traditional printers' Printheads.

The inclination of the Printhead of the traditional printers is corrected with software (the adjustment program)*1. However, the inclination of the Printhead of this printer is corrected mechanically by adjusting the head angular adjustment dial mounted on the carriage mechanism based on the result of visual check of the adjustment pattern printed with the adjustment program.

In this adjustment, the inclination of the Printhead is defined as the amount (3) of misalignment of the nozzles (B) on row H and the center points of the spaces between the nozzles (A) on row A shown below. The purpose of the adjustment is to eliminate the misalignment (the inclination of the Printhead) completely.

• 1: No inclination
• 2: Inclined

*1: For the correction of the inclination of the Printhead of the traditional printers is made using software with the calculation result of the amount of the inclination of the Printhead based on the result of visual check of the adjustment pattern. For the band feeding used in the draft mode, the head angular adjustment using software; different from the mechanical inclination correction explained here, is used.

Range of adjustment

By rotating the head angular adjustment dial (C) on the CR unit (A), the Printhead (B) 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 12µm, and adjustable up to ± 144µm.