Satisfying Ellips drawing tool

Ellipse Drawing Tool – Mechanical Ellipsograph

This is a purely mechanical ellipse drawing tool that allows you to draw clean, repeatable ellipses using simple guided motion.
Inspired by classic drafting mechanisms, this design converts constrained linear movement into a smooth elliptical path, no electronics, no software, just geometry.

Perfect for:

• ✏️ Technical drawing & drafting
• 📐 Geometry demonstrations
• 🛠️ Makerspaces & education
• 🎨 Creative sketching and pattern design

How it works

The mechanism is based on a two-axis sliding system where a pen holder follows a mathematically defined ellipse. By changing the mounting positions, you can adjust the major and minor axes of the ellipse.

Features

• Draws smooth, accurate ellipses
• Fully mechanical (no calibration needed)
• Parametric proportions (ellipse size can be changed)
• Designed for standard pens or pencils
• Educational and visually satisfying to use

Assembly

All parts press-fit or assemble with simple fasteners.

Note

Double sided tape or a little bit of glue helps to keep the tool on the paper.

If you enjoy mechanisms, geometry, or classic drafting tools, this ellipsograph is a fun and functional print.

Happy making! 🛠️📐