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A Study on Mechanism of Local Dot Positioning Errors Caused by a Paper Fed into Second Transfer

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In a tandem printer, local dot positioning errors at a first transfer, which likely occur in thick paper printing, are unacceptable problems.

In this study, the mechanism of generating local dot positioning errors is investigated by FEM analysis. At first, vibration characteristics of a transfer belt drive system are investigated experimentally. And then, motion and deformation of a belt, a paper and rollers with the vibration characteristics are analyzed by FEM. Finally, calculated belt velocity fluctuation is validated by comparison with experiments.

As a result, it is clarified that the local dot positioning errors by belt velocity fluctuation at the first transfer are generated by belt tension and torque fluctuations on the drive shaft caused by impacts when leading edge of the thick paper is fed into a second transfer nip region. It has been known that the impacts generate a torque fluctuation on the drive shaft in a belt drive system as well as a steel rolling mill system. However, it is found in the result that they also generate a belt tension fluctuation in a pre-nip region caused by a contact force between a belt and a paper.

Present calculations can also provide image quality deterioration levels affected by jitter since the practical velocity fluctuations are accurately simulated.
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Document Type: Research Article

Publication date: 2009-01-01

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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