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Eric Mallet, R. Du (1999)
Finite element analysis of sewing processInternational Journal of Clothing Science and Technology, 11
J.J More, M.Y. Cosnard
BRENTM: a fortran subroutine for the numerical solution of systems of non‐linear equations (C5)
J Zajaczowski
Torsional vibrations of shafts in a sewing machine
J. Moré, M. Cosnard (1980)
Algorithm 554: BRENTM, A Fortran Subroutine for the Numerical Solution of Nonlinear Equations [C5]ACM Trans. Math. Softw., 6
J Zajaczowski
Dynamics of belt drive of a hook in a sewing machine
J Zajaczowski
Dynamics of a zigzzag sewing machine with an oscillatory hook
J Zajaczowski
Torsional vibration of a hook shaft in a sewing machine
J. Zajączkowski (1999)
VIBRATIONS OF A CRANK-SHAFT IN A SEWING MACHINE INDUCED BY A ZIGZAG MECHANISMInternational Journal of Clothing Science and Technology, 11
Considers the mathematical modelling of sewing machines. The machine with a rotary hook and with a feed mechanism driven by two triangle cams is studied. The behaviour of the system is described by a set of non-linear autonomous ordinary differential equations. It is shown that, due to the timing belt extensibility, the actual relative position of the needle and the hook is different from that expected. This difference is a result of the conflict between the almost constant speed of the hook shaft and the fluctuating speed of the crank-shaft caused by the reciprocating motion of working elements. The vibration of the belt increases with speed. Resonance increase of vibrations takes place when the shaft speed is equal to natural frequency or its fraction 1/n for n = 1, 2, 3, 4, 5.
International Journal of Clothing Science and Technology – Emerald Publishing
Published: Dec 1, 2000
Keywords: Non‐linear response; Sewing
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