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Synthesis of Adjustable Offset Slider-Crank Mechanism for Simultaneous Generation of Function and Path using Variable-Length Links

This paper presents a new method to design an adjustable offset slider-crank mechanism to generate a function and a path simultaneously with the lengths of the input link and the link representing offset (henceforth called offset link) varying, without any limitation on the number of precision points. The mechanism comprises of the original offset slider crank mechanism along with a ternary link, a roller link and a guiding slot in the fixed link for each of the variable-length links. An n-degree polynomial is used to design the contours of the guiding slots, n being the number of precision points. A case study is provided to verify the feasibility of this new synthesis method. Keywords— adjustable mechanism; offset slider-crank mechanism; simultaneous task; variable-length links