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A Novel Method for Evaluating Ink-Jet Print Head Directionality

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Abstract:

Directionality of droplet ejection is an important character for the ink-jet printing process in many of the industrial applications. The conventional strobe system can only be used for roughly estimating the average directionality of a group of consecutive droplets. Other apparatuses available in the market are both costly and time-consuming for multinozzle measurement. This study reveals a fast and economic method for measuring the directionality of a multi-nozzle print head based on every single droplet behavior. The apparatus includes an X-Y table for supporting the printed media, a drop on demand print head for ejecting droplets, and a set of optical system for capturing dot images of droplets on printed media. Software programming based on the statistic and optimization theory is also developed for calculating the ejection directionality in this study, which includes two kinds of measurement method. One is the deflection of droplets ejected from every single nozzle. The other is the deviation of the average droplet position from its ideal position. Consequently, this new measurement technique is a powerful tool for developing highly accuracy and quality of inkjet print head.

Document Type: Research Article

Publication date: 2004-01-01

More about this publication?
  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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