Recent Blogs
Trotbot Leg Linkage Mechanism Explained: How the Eight-Bar Walking Linkage Works
Trotbot leg linkage explained — geometry, foot path, formulas, and a worked walking-robot example. Build notes from FIRGELLI's chief engineer.
Ghassaei Walking Linkage Mechanism: How It Works, Parts, Geometry, and Walking Gait Explained
How the Ghassaei walking linkage works — a single-DOF leg mechanism for kinetic sculpture, robotics demos, and educational walkers. Diagram, formula, examples.
Chebyshev Plantigrade Machine: How This Walking Linkage Works, Parts, Formula, and Uses Explained
Chebyshev Plantigrade Machine explained — how the linkage produces straight-line walking, real applications in robotics and museum exhibits, plus a worked build example.
Theo Jansen Strandbeest Leg Mechanism: How the 12-Bar Linkage and Holy Numbers Work
How the Theo Jansen Strandbeest Leg works, with linkage geometry, the holy numbers, a worked walking-speed example, and real kinetic-sculpture applications.
Tape-spring Hinge Mechanism Explained: How It Works, Diagram, Animation, Parts and Uses
Tape-spring hinges deploy and lock satellite booms, solar arrays, and antennas using stored strain energy in a curved steel strip. Specs, formulas, examples.
Origami Waterbomb Base Mechanism: How It Works, Crease Diagram, Packing Ratio & Uses
How the Origami Waterbomb Base works as a compliant mechanism — fold geometry, deployment math, and real uses in medical stents, airbags, and space optics.
Miura Fold Deployable Mechanism: How It Works, Parts, Formula, and Aerospace Uses Explained
Miura fold deployable mechanism explained — how the rigid-origami crease pattern unfolds solar arrays, antennas and aerospace structures with a single pull.
Living Hinge Mechanism Explained: How It Works, Diagram, Formula, and Design Parts
Living Hinge design guide for product engineers — how compliant polypropylene flexures replace pin hinges in caps, cases, and consumer plastics.
Cross-axis Flexure Pivot Mechanism: How It Works, Parts, Formula, Diagram and Uses Explained
Cross-axis Flexure Pivot explained — how crossed leaf springs replace bearings for frictionless rotation in optics, aerospace and precision instruments.
Bistable Buckled-beam Mechanism Explained: How It Works, Diagram, Parts, Formula and Uses
How the bistable buckled-beam mechanism works, with snap-through force equations, design tradeoffs, and named applications in MEMS switches and consumer products.
Worm-and-roller Steering Mechanism: How It Works, Diagram, Parts, Formula and Uses Explained
Worm-and-roller steering explained — how the roller follower rides the worm to steer trucks and SUVs, with formulas, ratios, and real diagnostic tips.
Recirculating Ball Steering Mechanism Explained: How It Works, Parts, Diagram, Uses & Formula
Recirculating ball steering explained — how the worm and ball nut convert wheel input to road-wheel angle in trucks, SUVs and heavy off-road vehicles.
Pitman Arm Steering Mechanism Explained: How It Works, Diagram, Parts, and Uses
Pitman Arm explained — how this steering linkage converts gearbox rotation into wheel motion in trucks, off-road vehicles, and heavy equipment.
Bell Crank Steering Mechanism: How It Works, Diagram, Formula and Real-World Uses
Bell Crank Steering explained — how the L-shaped lever transfers steering motion in karts, RC cars, and aircraft nose gear, with formulas and worked examples.
Ackermann Steering Linkage Mechanism: How It Works, Diagram, Geometry, Formula and Uses Explained
Ackermann steering linkage geometry explained — how it eliminates tyre scrub, the formula to size it, and real examples from Formula SAE to forklifts.
Steering Gear Mechanism Explained: How It Works, Parts, Diagram and Steering Ratio Formula
Steering gear converts wheel rotation into road-wheel angle. Learn rack-and-pinion vs recirculating ball, ratios, and real automotive use cases.
Stewart Platform (hexapod) Mechanism Explained: How It Works, Diagram, Parts, Formula and Uses
Stewart Platform explained — how a 6-DOF hexapod works, the kinematics formula, and real motion-simulator and machining applications. Practical engineering guide.
Spherical Wrist Mechanism Explained: How It Works, Diagram, Parts, Formula and Industrial Uses
How a spherical wrist works in 6-DOF robot arms — three intersecting axes, kinematic decoupling, and real applications in welding, painting, and surgery.
SCARA Arm Mechanism Explained: How a 4-Axis Selectively Compliant Robot Works
How a SCARA Arm works, with cycle-time math, payload trade-offs, and real applications in electronics assembly, packaging, and lab automation.
Delta Robot Mechanism: How Parallel Kinematic Pick-and-Place Works, Parts, Diagram, and Uses
Delta robots use 3 parallel arms for high-speed pick-and-place at 300+ picks/min. Learn the kinematics, real applications in packaging, and design tradeoffs.
Cartesian Robot Mechanism: How XYZ Gantry Robots Work, Parts, Uses and Motion Formula Explained
Cartesian robot mechanism explained — how XYZ gantry axes deliver sub-0.1 mm precision in CNC, 3D printing, pick-and-place, and industrial automation builds.
Spherical Four-bar Linkage Mechanism Explained: How It Works, Parts, Diagram and Uses
Spherical four-bar linkage explained: how concurrent-axis kinematics transmit motion between angled shafts in robotics, aerospace and automotive steering.
Schatz Linkage Mechanism: How the Six-Bar Spatial Inversion Works, Parts, Diagram and Uses
The Schatz Linkage is a 6-bar spatial mechanism that traces a closed inversion path. Learn how it works, where it's used in mixing and robotics,...
Goldberg 5R Linkage Mechanism: How It Works, Bennett-Based Geometry, Parts and Deployable Uses Explained
Goldberg 5R linkage explained — how this overconstrained spatial mechanism folds, the math behind it, and where it appears in deployable aerospace structures.
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.