Recent Blogs
Geared Ellipsograph: Cardan-Circle Geometry Calculator | FIRGELLI
Explore an ideal 2:1 rolling-circle ellipsograph. Adjust ring pitch diameter and pen offset to calculate ellipse semi-axes, area and eccentricity.
Ellipsograph Turntable Mechanism: How It Works, Parts, Formula and Diagram Explained
Explore an extended-arm ellipsograph and compare guide clearance with load-scaled measured deflection. The ideal ellipse is separate from the fit comparison.
Trammel of Archimedes: Ellipse Geometry Calculator
Explore perpendicular sliders with a tracing point between them. Calculate ideal semi-axes, area and eccentricity from point-to-slider distances.