Recent Blogs
Barrel Cam: Rise–Dwell–Return Timing
Explore barrel-cam rise, dwell and return phases. Check that angles fit one revolution and calculate mean follower speeds and dwell time.
External Geneva Drive: Index and Dwell
Explore an external Geneva drive and calculate index, engagement and dwell angles from slot count, plus the driver period from rotation speed.
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.
Slotted Connecting Rod with Rest at End: Mechanism, Diagram, Formula, and Uses Explained
Explore a crank pin moving through a slotted connecting rod. Compare selected slot travel, ideal slide stroke, rest share and rest time.
Single Revolution Per Stroke Mechanism: How Punch Press Clutches Work, Parts, Formula, and Uses
Single revolution per stroke mechanisms convert one input rotation into one output cycle — used in punch presses, packaging, and stamping machines.
Vibrating-Arm Pawl Ratchet: Animation and Indexing Calculator
Calculate ideal step angle, average wheel speed and strokes per revolution from ratchet tooth count, assumed teeth per stroke and stroke rate.
Treadles and Chain to Ratchet Wheel: Angular Pitch Comparison
Compare an entered rocker sweep with uniform ratchet tooth pitch. Count complete pitch intervals and remaining angle without predicting pawl engagement under load.
Tilt Hammer: Ideal Cam-wiper Event Timing
Explore a camshaft lifting and releasing a pivoted hammer. Calculate ideal event timing from wiper count and shaft speed; impact energy and real motion are...
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 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.
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...
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.
Bent-spring Driver with Strong-spring Catch: How the Mechanism Works, Parts, Formula, and Uses
Explore a bent spring on a rotating carrier engaging an intermittent ratchet through a fixed catch. Compare spring rates, preload and catch seating force.
Intermittent Motion: Geneva Index and Dwell Calculator | FIRGELLI
Compare ideal Geneva step and index/dwell fractions, including an overlap warning for equally spaced pins. Physical multi-pin compatibility is not established.
Pawl Lift: Two-Pawl Rack Indexing Sequence
Explore a two-pawl rack lift. Calculate ideal indexed travel and elapsed time from rack pitch, completed raising strokes and stroke cadence.
Continuous to Alternating Crank Gears: How the Mutilated Sector Gear Mechanism Works
Explore a partial bevel gear alternately driving opposed gears on a common shaft. Compare angular stroke, tooth-free gaps and reversal rate.
Pawl-and-Elbow Lever Feed: Brown Movement 155
Explore Brown’s elbow-lever pawl feed. Calculate ideal angle per stroke, total wheel turns, average speed and elapsed time from whole-tooth indexing inputs.
Vibrating Toothed Wheel: Escapement Animation and Frequency Calculator
Explore a toothed wheel and pallet illustration, convert cycle frequency into beats and releases, and express an entered daily time error in ppm.
Stop Motion Mechanism: How It Works, Diagram, Parts & Uses in Textile Looms
See how a broken warp thread triggers an electrical stop motion. Estimate shaft travel from machine speed, detection delay, release delay and braking time.
Slotted Vibrating Bar to Horizontal Bar Mechanism: How It Works, Diagram, Parts, and Uses
See how a pivoted slotted lever drives a horizontal slider. Calculate ideal stroke, mean round-trip speed and one-sided travel.
Reciprocating Feed Ratchet Mechanism: How It Works, Parts, Diagram, and Industrial Uses
Compare ratchet tooth counts and teeth per stroke to calculate index angle, tooth pitch and strokes per revolution. Explore the drive and return sequence.
Ratchet Lift Mechanism Explained: How It Works, Diagram, Parts, Formula and Uses
Explore a ratchet lift’s drive, load-transfer and return phases. Compare ideal handle effort, step height and load work with an interactive calculator.
Power Escapement: One-Tooth Lock–Release–Relock Schedule
Power escapement explained — how it meters energy release in clocks, indexing tables, and ammunition feeds, with formulas, tolerances, and a worked example.
Continuous Motion Ratchet: Three-Bevel-Gear Drive and Feed Calculator
Explore a three-bevel-gear ratchet drive that advances on both handle strokes. Compare ideal screw-feed rates from tooth count, pitch and complete cycle rates.