The mechanism contains a slider crank kinematic chain connected in parallel with a slider crank. The kinematic chain RRT´s joints are connected with the crank and coupler of the slider crank. By means of changing the geometrical lengths of the mechanism´s links, the coupler point M describes a range of coupler curves.
The file was generated with the CAD software ProE for the geometrical dimensions: l1 = 20 mm, l1´ = -15 mm, l2 = 77 mm, l4 = 70 mm, x = -4 mm, α = 25°.