The weaving process in a handmade carpet contains independent knots, which have a complex structure. A new production method, mechanism, or machine for producing knots in handmade carpets has not been developed since thousands of years. They are still woven by human hand. Two different types of knots are used to form handmade carpets, which are called as the Turkish (Gördes knot) and the Persian (Sehna knot) knots. In this article, the conceptual design and dimensional synthesis for mechanisms used to produce these knots are studied. To generate all-acceptable one-degree of freedom (DOF) and two-DOF planar knotting mechanism, a systematic methodology is presented. First, the functional requirements of the knotting mechanism are established according to the problem statement. Some of the functional requirements of the knotting mechanism are then translated into the structural characteristics of mechanism. On the basis of the requirements and the structural considerations, the unwanted mechanism is screened out. Finally, two different mechanisms are developed for the knotting mechanism and their dimensions are determined by dimensional synthesis method.
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