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Ejection apparatus and ejection speed calculation method

A technology of injection speed and injection device, which is applied in the field of injection device and injection speed calculation, and can solve problems such as the inability to calculate injection speed with high precision.

Pending Publication Date: 2021-11-23
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the method of calculating the ejection velocity under the setting where the distance between the ejection head and the droplet detection sensor is fixed as discussed in Japanese Patent Application Laid-Open No. 2007-152853, if the distance between the ejection head and the droplet detection sensor The jet velocity cannot be calculated with high precision if there is an error in the distance between

Method used

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  • Ejection apparatus and ejection speed calculation method
  • Ejection apparatus and ejection speed calculation method
  • Ejection apparatus and ejection speed calculation method

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Embodiment Construction

[0024]

[0025] figure 1 is a diagram illustrating the appearance of an inkjet printing device (hereinafter referred to as a printing device) 100 as an example of the droplet ejection device according to the first exemplary embodiment.

[0026] figure 1 The printing apparatus 100 illustrated in includes a discharge guide 101 on which recording media are stacked, a display panel 103 for displaying various printing information, setting results, etc., and an operation for setting a printing mode, recording sheets, etc. Button 102. The printing apparatus 100 also includes an ink cartridge unit 104 that accommodates ink cartridges for storing inks of colors such as black, cyan, magenta, and yellow, and supplies ink to a print head 201 that is an example of a droplet ejection head. ( figure 2 ). figure 1 The printing apparatus 100 illustrated in is a printing apparatus capable of printing images on recording media of various widths up to a recording medium of 60 inches (152.4...

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PUM

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Abstract

The invention discloses an injection apparatus and an injection speed calculation method. In a state where a distance from an ejection port surface of an ejection head to a predetermined position corresponds to a first distance, a period detection unit detects a first period from when ejection of a droplet from an ejection port is started until when a droplet detection unit detects the droplet, and in a state where the distance from the ejection port surface of the ejection head to the predetermined position is changed to a second distance by a change unit, the period detection unit detects a second period from when ejection of a droplet from the ejection port is started until when the droplet detection unit detects the droplet, the second distance being different from the first distance. A calculation unit calculates an ejection speed of the droplet, based on the first distance, the second distance, the first period, and the second period.

Description

technical field [0001] The invention relates to a spraying device and a calculation method of spraying speed. Background technique [0002] In an inkjet printing device, the ejection speed of ink droplets may vary depending on individual differences of the printing device and print head after long-term use, physical properties of ink, and usage conditions and environmental influences. If the ejection speed of the ink droplet is changed, for example, when an image is printed by reciprocating scanning of the print head, the landing position of the ink droplet ejected in the forward direction is different from the landing position of the ink droplet ejected in the backward direction. Alignment (misalign). This results in deterioration of image quality. [0003] Japanese Patent Application Laid-Open No. 2007-152853 discusses a registration adjustment method in which a photodetector for measuring the ejection velocity of the ejected ink is provided, and the movement of the prin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/01B41J29/393
CPCB41J2/01B41J29/393B41J2/04561B41J2/04503B41J2/04505B41J2/2135B41J2/04558B41J25/3088B41J19/145B41J2/04586B41J2/04556B41J29/38G01P3/685
Inventor 清川佑辅根岸将史
Owner CANON KK