FreeCAD: Linking and animating a set of gears by turning / adjusting drive gear angle with formula

Linking together a number of a number of gears and controlling the rotation from one gear only, the drive gear. This tutorial teaches you how to use a formula attached to each gear to control all your gears in your setup. For ease of use we also create a simple play button to progress the animation one frame at a time with 3 lines of python code and add that to our toolbar.
#FreeCAD #animation #tutorial
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