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Method for determining ink drop velocity of carrier-mounted printhead

A carrier and print head technology, applied in printing devices, printing, etc., can solve the problem of ink droplets not strictly falling, and achieve high-quality printing

Inactive Publication Date: 2007-09-05
LEXMARK INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result is that the ink drop does not land strictly on the required position

Method used

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  • Method for determining ink drop velocity of carrier-mounted printhead
  • Method for determining ink drop velocity of carrier-mounted printhead
  • Method for determining ink drop velocity of carrier-mounted printhead

Examples

Experimental program
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Embodiment Construction

[0014] A first method of the present invention is used to determine the ink drop velocity of a printhead mounted on a vehicle at a predetermined gap above a print medium, where the ink drop velocity is defined as the ink drop velocity relative to the printhead. The first method is shown in Figure 1 in block diagram form and comprises steps a) to d). Step a) is labeled "Print a first ink mark at a first printhead speed" in box 10 of Figure 1 . Step a) comprises printing a first ink mark on the print medium at a first print head speed using a print head moved along a scan axis by a print head carrier, wherein the print head starts at an ink ejection position along the scan axis corresponding to the first ink mark Jet ink. Step b) is labeled "Print a second ink mark at a second printhead speed" in box 12 of FIG. 1 . Step b) comprises printing a second ink mark on the print medium at a second print head speed different from the first print head speed using a print head moved alo...

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PUM

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Abstract

A method for determining ink drop velocity of a printhead located at a gap above a print medium (24). A first ink mark (26) is printed at a first printhead velocity (CV1). A second ink mark (28) is printed at a different (in magnitude and / or direction) second printhead velocity (CV2). The ink for the second ink mark is ejected from the printhead at the same print ejection position (20) used for the first ink mark plus a predetermined offset distance (if any). The distance between the ink marks is measured. The ink drop velocity is calculated using the measured distance, the predetermined offset distance, the first and second printhead velocities, and the predetermined gap (23). In another method, an ink mark is printed, a distance is measured between the ink mark and the ink-ejection position, and the ink drop velocity is calculated using the measured distance, the printhead velocity, and the gap.

Description

technical field [0001] The present invention relates generally to printing, and more particularly to a method of determining ink drop velocity from a printhead mounted on a vehicle. Background technique [0002] Known printers include printers such as inkjet printers that include a vehicle-mounted printhead having print nozzles for printing ink onto a print medium. The printhead carriage moves the printhead positioned at a predetermined gap above the print media back and forth along the scan axis. Printing can be left-to-right, right-to-left or bi-directional (ie left-to-right and right-to-left). After the printing head finishes printing a scanning line on one or more printing channels, the printing medium moves forward along a direction perpendicular to the scanning axis. [0003] The printhead is activated with sufficient energy to eject ink from the nozzles at an ink drop velocity (defined as the drop velocity relative to the printhead) along the direction from the prin...

Claims

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Application Information

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IPC IPC(8): B41J2/15B41J29/38B41J2/165B41J2/01B41J29/393
CPCB41J29/393
Inventor D·G·金P·L·克罗格
Owner LEXMARK INT INC