Recent Blogs
Star-wheel Ratchet Mechanism: How It Works, Parts, Diagram, and Indexing Formula Explained
Star-wheel Ratchet mechanism explained — how the spring-loaded detent indexes a pointed rotor one step per stroke, with formulas, real machine-shop examples, and design rules.
Internal Geneva Drive: Index Angle and Dwell Calculator | FIRGELLI
Calculate index angle, accumulated output travel and motion/dwell intervals for an ideal internal Geneva. Explore the radial-slot and drive-pin motion.
Geneva Drive (external) Mechanism Explained: How It Works, Diagram, Parts, Formula & Uses
Geneva Drive explained — how the external Geneva mechanism converts continuous rotation into precise indexed motion for film projectors, turrets, and packaging lines.
Continuous Rotary to Intermittent via Cam and Disk: How It Works, Parts, Formula and Uses
Explore a stepped cam and two-stop disk. Adjust shaft offset, scale and input speed to calculate half-turn indexing and stationary intervals.
Star Wheel Mechanism: How It Works, Diagram, Parts, Formula and Industrial Uses Explained
Star Wheel Mechanism explained — how the indexing geometry works, real applications in bottling and machine tools, plus a worked example with numbers.
Colt Revolving Cylinder: Historical Mechanism Illustration
Explore a schematic revolving-cylinder arrangement in historical context. The illustration does not provide firearm timing, tolerances or construction specifications.
Geneva Drive: External Indexing Geometry and Dwell Formula | FIRGELLI
Understand a standard external Geneva drive, calculate step angle and dwell time, and compare four-, six- and eight-slot timing with worked examples.