Recent Blogs
Triangular Eccentric: Threefold Form and Height Comparison
Explore a schematic triangular form and compare two defined geometric heights. The calculation does not determine a cam profile or follower stroke.
Rack-Rod from a Mutilated Spur Gear: Ideal Advance/Dwell Ledger
How a mutilated spur-gear drives a rack-rod for intermittent linear motion — geometry, formulas, worked example, and packaging-line applications.
Mutilated Gear Intermittent Drive: Tooth Sector and Holding Pair
Explore a mutilated gear with a holding ring and cam. Calculate ideal output step, sector arc, dwell fraction and dwell time from tooth counts and...
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.
Driving Disk with Rim and Stops Mechanism Explained: How It Works, Parts, Formula & Uses
Explore a tappet and studded disk with an outer retaining rim. Adjust spacing, stud count and speed to calculate contact timing and output steps.
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.
Irregular Rocking Motion: Work and Return Allocation Calculator | FIRGELLI
Watch a crank pin drive a grooved rocking arm. Separately compare two entered angular allocations, their ratio and normalized shares.
Intermittent Transmission: Geneva Engagement Time Calculator | FIRGELLI
Calculate ideal one-pin external-Geneva step, index and dwell shares, and engagement time at constant driver speed. Settling and operating-speed limits are not calculated.
Watt Six-bar Linkage: Mobility Count and Dwell-time Comparison
View a fixed illustrative Watt I six-bar. Calculate generic planar mobility and convert an entered interval to cycle angle and percentage at constant speed.
Stephenson Topology Six-bar Linkage: How It Works, Diagram, Parts, Uses & Calculator
Stephenson topology six-bar linkage explained — how it works, kinematic equations, and real applications in packaging, automotive seats, and industrial machines.
Six-bar Linkage Mechanism Explained: How It Works, Parts, Diagram and Uses
Explore a moving Watt-type six-bar linkage with seven pin joints and use the planar mobility calculator to compare link and joint counts.
Toggle-joint Cam Movement: Ideal Symmetric-link Force Calculator
Explore a cam acting on a toggle knee. Compare ideal symmetric-link reactions and knee offset, with an entered scaling factor separate from real losses.
Intermittent Reciprocating Motion: Dwell Time Calculator | FIRGELLI
Convert a total dwell angle and constant input rpm into cycle, dwell and non-dwell time. Rack travel and gear engagement are illustrative.
Rolling-contact Gears with Forked Catch: How the Mechanism Works, Parts and Indexing Uses Explained
How rolling-contact gears with a forked catch deliver intermittent indexing motion in packaging, textile and assembly machines — function, formula, worked example.
Intermittent Gears: Angular Segment Calculator | FIRGELLI
Compare toothed and locking angle shares and check whether they total 360°. Output travel, tooth geometry and working lock dimensions are not calculated.
Eccentric Spur-gear with Link Control Mechanism Explained: How It Works, Parts, Diagram & Uses
Explore an eccentric three-gear train with linked centers. Adjust offset, module and input speed to calculate the varying output speed and see both gear meshes.