4 Bar Link Calculator File
[ r_2 \cos\theta_2 + r_3 \cos\theta_3 = r_1 + r_4 \cos\theta_4 ] [ r_2 \sin\theta_2 + r_3 \sin\theta_3 = r_4 \sin\theta_4 ]
Differentiating the loop equations yields angular velocities using the known input angular velocity. 4 bar link calculator
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. [ r_2 \cos\theta_2 + r_3 \cos\theta_3 = r_1
Given link lengths and crank angle, output the angles of the coupler and follower, plus the coupler point position. plus the coupler point position.
