Synthesis of conjugate Geneva mechanisms with curved slots

A suitable algorithm for the kinematic synthesis of conjugate Geneva mechanisms with curved slots and for that of their pure-rolling cam-equivalent is proposed. The kinematic-equivalent pure-rolling cam mechanisms are obtained by using the centrodes of the relative motion between crank and Geneva wheel. The proposed indexing mechanisms are compared by using the pressure angle as a figure of merit of force transmission. Numerical results are included for design purposes.