In Situ Measurement of Instantaneous Jetting Speed Curve

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The jetting speed of an inkjet droplet from an inkjet head has been measured, and is widely used in industry to improve jetting performance. The measured jetting speed is used to control the inkjet head by modifying the driving waveform voltage. In jetting speed measurements, the travel distances of an inkjet droplet during two pre-defined timings are used. However, the jetting speed varies significantly during drop formation. If there is a ligament or satellite, the jetting speed is significantly affected. Thus, measured jetting speed using the current methods can differ according to the selection of the two timings. We proposed an instantaneous jetting speed curve to overcome the shortcomings of previous techniques. By determining the instantaneous jetting speed curve, we can understand jetting speed variation during drop formation. Also, the relative jetting speed of satellites with respect to the main droplet during drop formation can be using the proposed approach.

Document Type: Research Article

Publication date: January 1, 2010

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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