Recent Blogs
Grashof Linkage: Four-Bar Assembly and Rotation Calculator | FIRGELLI
Check four link lengths for assembly and Grashof rotation. Compare sorted sums and margin, with a longest-ground four-bar animation and worked example.
Closed Four-Link Chain: Planar Mobility Calculator | FIRGELLI
Explore planar link and joint counts, the Gruebler–Kutzbach equation and a four-bar illustration. Understand connectivity and constraint assumptions.
Double-rocker Mechanism: How It Works, Parts, Formula, Diagram and Uses in Four-Bar Linkages
Explore a double-rocker four-bar linkage. Set four link lengths to calculate assembly class, feasible input limits and sampled output swing.