The angle between the coupler and follower—critical for force transmission. Values near (90^\circ) are ideal; below (40^\circ) or above (140^\circ) cause poor mechanical advantage.
Second derivatives provide angular accelerations, essential for force and inertia calculations. 4 bar link calculator
Given link lengths and crank angle, output the angles of the coupler and follower, plus the coupler point position. The angle between the coupler and follower—critical for