Recent Blogs
Spring Cyclograph Mechanism Explained: Parts, Decaying Spiral Formula, Diagram and Worked Example
How a Spring Cyclograph draws decaying spirals and damped curves for draughtsmen, engineers, and ornament designers — geometry, formula, and a worked example.
Spirograph Mechanism Explained: Hypotrochoid and Epitrochoid Curves, Parts, Formula, and Uses
Spirograph explained — how the hypotrochoid gearing draws roulette curves, the math behind the patterns, and how draughtsmen and educators use them today.
Trammel for Drawing Ellipses: How the Archimedes Mechanism Works, Parts and Uses
How a Trammel of Archimedes draws true ellipses for pattern-makers, sign carvers and toolmakers. Geometry, formula, worked example and tolerance rules.