4 Bar Link Calculator Site

Given link lengths and crank angle, output the angles of the coupler and follower, plus the coupler point position.

[ \mathbf{r}_1 + \mathbf{r}_2 = \mathbf{r}_3 + \mathbf{r}_4 ] 4 bar link calculator

where (K_1, K_2, K_3) are constants derived from link lengths. A 4-bar link calculator automates this solution, handling the two possible assembly configurations (open vs. crossed). A comprehensive 4-bar link calculator typically offers: Given link lengths and crank angle, output the

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. Given link lengths and crank angle

Breaking into (x) and (y) components for a given crank angle (\theta_2):

Second derivatives provide angular accelerations, essential for force and inertia calculations.