Recent Blogs
Tappet-and-stud Counter Wheel: Ideal Indexing Calculator
Calculate ideal pitch, accumulated steps, final index and wheel turns from entered positions and stud passes. Every pass is assumed to complete one step.
Tappet-stud Revolution Counter: Entered Count Comparison
Compare verified revolutions and logged counts against an ideal one-count-per-revolution reference. Differences do not identify mechanical faults.
Single-tooth Small Wheel to Large Intermittent Mechanism: How It Works, Parts, Formula & Uses Explained
How a single-tooth driver indexes a large count wheel one notch per revolution — geometry, sizing math, and a worked sawmill tally counter example.
Single-tooth Small Driver, Lock by Rim Mechanism Explained: How It Works, Parts, and Diagram
Single-tooth small driver with rim lock: how this intermittent counter wheel indexes one notch per input revolution, with formulas, examples, and trade-offs.
Single-tooth Driving Wheel and Notched Wheel: How This Intermittent Indexing Mechanism Works
How a single-tooth driving wheel and notched wheel produce 1-step-per-revolution intermittent motion for counters, score reels, and dispensers — with formulas and worked examples.
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...
Modified Two-Pawl Lever: Ideal Indexing
Explore a modified two-pawl lever that advances a ratchet one tooth on each half-stroke. Calculate ideal indexing rate and wheel speed from lever cycles and...
Drop-and-Pawl Intermittent Rotation: Indexing Calculator | FIRGELLI
Compare star-wheel step angle, events per revolution and average event frequency. Brown movement 63 supplies the historical sequence; the current illustration does not solve contact...
Driving Wheel with Internal Rim Guard: How It Works, Parts, Formula & Diagram Explained
Explore a tappet and studded disk with an inner retaining rim. Adjust spacing, stud count and speed to calculate contact timing and output steps.
Spur-gear Stops Mechanism: How It Works, Diagram, Formula, and Uses Explained
Spur-gear Stops limit rotation to a fixed number of turns in safes, winches, and counters. See how they work, the math, and real industrial examples.
Operation of a Counter: Hiscox Sector-and-Pin Cascade
Explore Hiscox's sector-and-pin counter cascade. Calculate ideal positional display, carry counts and wheel step from event count, rollover base and wheel count.
Engine Counter: Ratchet Animation and Average Shaft-Speed Calculator
Explore a mechanical engine counter and calculate average shaft rpm from timed counts and counts per revolution. Includes a ratchet and register animation.
Two-toothed Pinion: Ideal Intermittent Step Calculator
Explore an incomplete pinion and calculate ideal advance from active and driven tooth counts. The engagement slider changes illustrative timing only.
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.