Recent Blogs
Tape-spring Hinge: Cross-section Geometry Calculator
Explore tape-spring cross-section arc length and nominal curvature strain. The geometry index and angle reference do not predict torque or latching.
Miura-ori: Exact Flat-Pattern Geometry and Qualitative Fold View
Explore the Miura-ori crease pattern and calculate flat facet area and diagonals. A qualitative fold view illustrates deployment without predicting folded dimensions.
Sarrus Linkage Mechanism: How It Works, Parts, Formula, Diagram and Uses Explained
Sarrus Linkage explained — the spatial straight-line mechanism behind deployable solar arrays, scissor lifts, and folding optics. With formula and worked example.
Bricard 6R Linkage Mechanism Explained: How the Overconstrained 6R Loop Works, Parts, and Uses
Explore a spatial Bricard 6R loop. Compare two assembly forms, adjust scale and view six hinge axes, joint angles and numerical loop closure.
Bennett's Linkage Mechanism Explained: How It Works, Geometry, Formula, Uses & Animation
Explore Bennett’s spatial four-revolute linkage. Compare alternating lengths and twists, required-angle solutions and ideal closure, with mismatches shown as open chains.
Hoberman Sphere: Folding Animation and Diameter Calculator
Explore a Hoberman-style sphere built from rigid bent scissor links. Watch its joints fold and calculate diameters for the illustrated equal-arm geometry.
Origami Vertex Angle Calculator: Kawasaki Condition | FIRGELLI
Check four sector angles at one origami vertex. See alternating angle sums, total angle and deviation from Kawasaki’s local flat-foldability condition.
Lazy-tongs Mechanism Explained: How Scissor Linkage Extends, Formula, Parts and Uses
Lazy-tongs explained — how the pantograph-style scissor linkage extends, the math behind reach and force, plus real uses in industrial reaching tools and stage rigs.