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Tutorial 07: How to Model an Eccentrically Cycloidal Drive in Blender

The recently invented Eccentrically Cycloidal (EC) drive is closely related to the hypocycloid drive described in our Tutorial #5. From the modeling point of view, these two mechanisms are very similar as they are built around the same basic shape - the cycloid disk. Both tutorials even use the same online calculator. With the help of this calculator, designing a functional EC drive will only take a few minutes. This tutorial also tests the EC gear pair for compatibility using Blender's Rigid Body Physics engine.

Be aware that the EC drive is covered by a number of US and international patents. For more information about the EC gear drive, its technical characteristics, and its patents, please go to We are not affiliated with this company in any way. However, this tutorial was created and published with their explicit permission.

Related: Hypocycloid Gear Calculator, 3D-Printable Eccentrically Cycloidal (EC) Gear Model