Types of Sewing Machines and their Uses

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A sewing machine consists of four basic mechanisms: a take-up mechanism, a needle-motion mechanism, a material-feeding mechanism, and a bobbin. Its proper operation requires a delicate balance of these mechanisms. This paper introduces a computer-simulation model that represents these mechanisms and uses the model to predict the kinetic behavior of sewing machines. Based on the simulation. a quantitative understanding of the sewing machine can be achieved that leads to improved sewing-machine design and better sewing-process control. In particular, the balance of thread supply and thread requirement is studied. the thread supply is defined as the amount of thread supplied by the take-up mechanism within one stitch. The thread requirement is

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