How you draw the loci of crank mechanism?

To draw the loci of a crank mechanism, first identify the fixed pivot, the crank pivot, and the output link. Use a compass to trace the circular path of the crank as it rotates around the fixed pivot. Then, mark the positions of the output link at various angles of the crank's rotation, connecting these points to visualize the locus. Finally, ensure to indicate the range of motion and any constraints that affect the output link's movement.