Recent Blogs
Whitworth Quick-return: Angular Timing and Clearance Comparison
Compare ideal working and return crank sweeps, plus clearance against an assumed 0.050 mm reference. Stroke, linkage closure and wear are not calculated.
Slotted-lever Quick Return: Ideal Timing-ratio Calculator
Calculate tangent-defined crank sweeps and ideal timing ratio from crank radius and fixed center distance. The illustrated ram uses assumed dimensions; physical ram stroke and...
Slotted Lever Motion Mechanism Explained: How It Works, Quick Return Geometry, Parts and Uses
Explore a crank and slotted lever, its tangent reversal positions, and the ideal work-to-return time ratio.
Reversible Pulley Mechanism Explained: How It Works, Diagram, Parts, Formula, and Uses
Compare open, neutral and crossed-belt states. See how belt routing changes direction and calculate ideal output rpm from pulley diameters and input speed.
Quick Reciprocating Motion: Declared Two-Arc Ledger
Quick reciprocating rectilinear motion converts rotation into a fast forward stroke and slower return — used in shapers, pumps, and packaging machines.
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.
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.
Irregular Reciprocating Motion: Mass and Acceleration Calculator | FIRGELLI
Convert an entered peak acceleration to inertial-force magnitude using mass, and convert a declared cycle rate to period. The block animation does not derive reciprocator...
Gear-Disengaging Cam Lever: Motion and Ideal Hand Force | FIRGELLI
See how an eccentric slot moves a gear carrier and compare ideal hand force and torque using lever length, an assumed moment arm and follower...
Continuous to Vibrating via Irregular Pinion: How It Works, Parts, Formula, and Industrial Uses
Explore an irregular gear, rocking pinion carrier and slotted rod drive. Compare rod stroke, speed, rocking frequency and calculated pinion pitch radius.
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.
Compression Helical Spring Mechanism: How It Works, Diagram, Formula, Parts and Uses Explained
Compare round-wire compression spring rates and see how a wire-diameter change affects stiffness. Adjust mean coil diameter, active turns and shear modulus.
Combination Crank-motion Curves: Crank-Rocker Linkage and Interactive Pen Trace
Explore the curve drawn by a pen on a crank-rocker’s rigid connecting arm. Change link lengths, pen offset, starting angle and cycle time.
Cam-lever Grip Mechanism Explained: How It Works, Parts, Diagram, Formula, and Uses
Explore an eccentric cam gripping a vertical rod. Compare closure, clearance take-up and force from a linear clamp stiffness; locking requires additional analysis.
Belt-shifter Reversing Mechanism Explained: How It Works, Diagram, Parts, and Uses
See how open and crossed belts select opposite rotation through a fixed centre pulley and loose outer pulleys. Compare belt width and shaft-spacing references.
Slotted-lever Quick-return Mechanism Explained: How It Works, Diagram, Parts, Formula and Uses
Explore normalized slotted-lever motion and calculate work and return times from the selected crank sweep and cycle time.
Yoke Strap Mechanism Explained: How It Works, Diagram, Parts, Formula, and Marine Rigging Uses
Explore ideal load sharing in a symmetric two-leg yoke. Compare leg tension and lateral components as the included angle changes.
Windlass Grip Pawl: Signed Force and Moment Comparison
Compare chain pull and signed pawl-offset moment. The negative-offset indicator describes the entered sign; it does not prove release or self-locking.
Wave Motions: Wavelength, Period and Transit-time Calculator
Convert a chosen propagation speed and frequency to wavelength and period. Compare a feature length with wavelength and calculate ideal transit time.
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.
Variable-radius Lever: Ideal Arm-length Calculator
Interpolate an assumed mechanical-advantage ratio and divide a total lever span into effort and resistance arms. Actual fulcrum motion and force capacity are not calculated.
Variable Vibratory Resultant: Equal-vector Phase Calculator
Compare the normalized resultant of two equal vectors at an entered separation angle. The calculator does not predict physical vibration force, frequency or machine response.
Variable Crank Throw: Ideal Stroke and Screw Adjustment
Calculate ideal stroke from crank radius and stroke change per radial screw turn. Compare radius with an explicitly entered symmetric span; actual slot capacity and...
Variable Crank Motion: Compare Two Ideal Slider Strokes
Compare ideal peak-to-peak slider strokes for two crank radii. Calculate their signed difference and ratio; instantaneous motion, loads and adjustment hardware are not solved.
Adjustable Crank Throw: Ideal Slider Stroke Calculator
Compare adjustable crank throw with an entered range and calculate ideal peak-to-peak slider stroke. The illustration does not size the adjuster, connecting rod, bearings or...