A Procedure for Arranging Equi-distance Points on Nongrashof Coupler Curves

Abstract

Nongrashof planar four-link mechanisms, that none of two neighboring links can make a complete rotation, generate complex coupler curves with highly nonuniform velocity when the driving link oscillates in such a manner that coupler and driven links belong to different composition loops in going and returning respectively. In this paper, for the poupose of classification and synthesis of nongrashof mechanisms, a procedure is presented for arranging points on the coupler curve with equal distance, in which the input and output angles are interchanged according to whether the differential coefficient of the output angle is greater than some reference values or not.