Chebyshev Linkage

Crank Angle: 45 °

Ground OB: 200 px

Crank OA: 80 px

Link AC: 200 px

Link BC: 200 px

Extension CD: 200 px

Configuration: Custom

Straightness: 100 %

Linkage Simulator

Show motion path

Crank OA 80px

Link AC 200px

Link BC 200px

Extension CD 200px

Crank Angle 45°

Speed 1.5x

Drag the pivot points O and B (dark gray) to change the fixed link positions.

For an approximate straight-line motion, try using classic Chebyshev proportions (OA:OB:AC:BC:CD = 1:2:2.5:2.5:2.5).

The red point D will trace a path with a nearly straight section when properly configured.