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A Study of Thread Tensions on a Lockstitch Sewing Machine (Part I)

F.B.N. Ferreira (Universidade do Minho, Azurem, Portugal)
S.C. Harlock (Department of Textile Industries, the University of Leeds, Leeds, UK)
P. Grosberg (Shenkar College, Ramat Gan, Israel)

International Journal of Clothing Science and Technology

ISSN: 0955-6222

Article publication date: 1 March 1994

567

Abstract

A study of thread tensions on a lockstitch sewing machine was made, measuring simultaneously both the needle and bobbin thread tensions. Experiments were carried out under specified sewing conditions, whereby needle and bobbin thread tensioner adjustment, sewing speed, number of plies, fabric quality and sewing thread quality were varied in order to investigate the effect of these factors on the needle and bobbin thread tensions. The patterns of the thread tension traces obtained were analysed as well as the effect of these factors on the peak tensions detected on both thread tension traces. Four significant peak tensions on the needle thread tension trace and two significant peak tensions on the bobbin thread tension trace were detected, during a stitch cycle. It was found that no significant variations occurred as far as the timing and shape of the peak tensions were concerned. However, variations were detected in the peak tensions according to the sewing conditions, as expected. From the analysis of the data obtained, multiple regression equations were derived to predict, with a good degree of accuracy, the peak tensions generated, according to the sewing conditions.

Keywords

Citation

Ferreira, F.B.N., Harlock, S.C. and Grosberg, P. (1994), "A Study of Thread Tensions on a Lockstitch Sewing Machine (Part I)", International Journal of Clothing Science and Technology, Vol. 6 No. 1, pp. 14-19. https://doi.org/10.1108/09556229410054468

Publisher

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MCB UP Ltd

Copyright © 1994, MCB UP Limited

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