Abstract
The mathematical model for tension in a moving web by Shin [1] was extended by considering thermal strain due to temperature fluctuations in the drying of a roll-to-roll system. The extended model describes variations in tension and includes terms that represent the change of the Young’s Modulus, the thermal coefficient, and the thermal strain. In this paper, a new control scheme based on the extended model is proposed for mitigation of tension disturbances due to thermal strain in the drying process. Tension feedback control logic generally is not be applied due to the fact that register errors can be induced by speed alterations that help to compensate for tension disturbances. But in our approach, the thermal strain in the web is compensated for by means of velocity adjustments without adding extra register errors in the steady state. A computer simulation followed by an experimental validation was carried out to confirm the performance of the proposed method. The results show that the proposed model is useful for describing tension behavior and suggest that tension control logic improves control precision for the drying module of a roll-to-roll e-printing system.
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This paper was recommended for publication in revised form by Associate Editor Kyung-Soo Kim
Changwoo Lee received a B.S. degree in Mechanical Engineering from Konkuk University in 2001. He received his M.S. and Ph.D. degrees from Konkuk university in 2003 and 2008, respectively. He is currently a research professor at the Flexible Display Roll to Roll Research Center at Konkuk University in Seoul, Korea, where he is working on the development of R2R multi-layer printing systems for printed electronics. His research interests are in the area of fault tolerant control, R2R e-Printing line design, non-contact transporting process, and tension-register control. He is the holder of several patents related to R2R e-Printing system.
Keehyun Shin received the B.S. degree from Seoul National University, Seoul, Korea, and the M.S. and Ph.D. degrees in mechanical engineering from Oklahoma State University (OSU), Stillwater. Since 1992, he has been a Professor with the Department of Mechanical Engineering, Konkuk University, Seoul, Korea and director of Flexible Display Roll to Roll Research Center. For more than 18 years, he has covered several research topics in the area of web handling, including tension control, lateral dynamics, diagnosis of defect rolls/rollers, and fault-tolerant real-time He is the author of Tension Control (Atlanta, GA: TAPPI Press, 2000) and is the holder of several patents related to R2R e-Printing systems.
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Lee, C., Kang, H. & Shin, K. A study on tension behavior considering thermal effects in roll-to-roll E-printing. J Mech Sci Technol 24, 1097–1103 (2010). https://doi.org/10.1007/s12206-010-0324-5
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DOI: https://doi.org/10.1007/s12206-010-0324-5