Recent Blogs
Inverse Cam: Illustration and Circular Arc-to-Angle Calculator | FIRGELLI
View an illustrative profiled follower and convert circular arc length to central angle. The calculator does not predict cam-profile tolerance or output error.
Face Cam: Cycloidal Motion and Follower-Speed Calculator | FIRGELLI
Explore a cycloidal axial cam schedule. Calculate ideal groove angle, follower speed and acceleration from stroke, rise angle, pitch radius and cam speed.
Eccentric Cone Change-velocity (form 1) Mechanism: How It Works, Parts, Formula and Diagram
Explore an eccentric cone on an advancing screw. Calculate roller height, signed rotational speed, vertical velocity and axial sliding during one turn.
Disk Cam with Oscillating Follower: How It Works, Parts, Formula, and Industrial Uses Explained
Explore an eccentric circular disk cam and oscillating roller follower. Calculate follower swing, output-tip arc and cycle time for the stated mounting geometry.
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.
Cam to Double-rack Frame with Governor: Mechanism, How It Works, Parts, Uses & Formula
Explore a governor-selected double-ratchet frame driven by a rotating pin. Compare feed direction, advance per revolution and mean selected feed rate.
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.
Wittgenstein's Rod: Clearance and RSS Error-budget Calculator
Compare entered rod clearance, pin play and straightness with an assumed root-sum-square budget. The tool does not solve linkage motion or production tolerances.
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.
Spiral Stop-motion Gear Mechanism: How It Works, Diagram, Formula and Indexing Uses Explained
Spiral stop-motion gear converts continuous input into precise stepped rotation for indexing turrets, watch movements, and automated assembly machinery.
Scroll Gear Mechanism Explained: How Spiral Pitch Curves Create Variable Gear Ratios
Scroll Gear explained — how a spiral-profile gear delivers gradually increasing speed or torque, with formulas, real industrial uses, and design tradeoffs.
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.
Servomechanism Mechanism Explained: How Closed-Loop Control Works, Parts, Diagram, and Uses
Servomechanism explained — how closed-loop feedback control works, real industry examples, sizing formula, and worked CNC example for engineers and integrators.
Hydraulic Shock Absorber: Energy and Average Force Calculator | FIRGELLI
Calculate equivalent average resisting force from energy and stroke, or stroke from an entered average-force threshold. Peak force and shock-absorber capacity are not calculated.
Electric Servo: Screw-Axis Animation and Encoder Resolution Calculator
Explore a direct-coupled servo screw axis and calculate encoder counts, angular resolution and linear feedback resolution from decoding mode and screw lead.
Dashpot Mechanism Explained: How It Works, Parts, Damping Formula, and Uses
Explore a linear viscous dashpot under prescribed constant-speed motion. Compare resisting force, dissipated power, energy per stroke and force divided by mass.
Cam (mechanism) Explained: How It Works, Diagram, Parts, Profile Formula and Uses
Explore a radial cam with linear rise and return. Adjust lift and event angles, then compare follower displacement, motion rate and the available lower dwell.