freeCAD with motion simulation isn't the same as FreeCAD from sourceforge. I've had a look at the sourceforge one, and found that it's more difficult to model in than others I've tried (commercial), because it doesn't have very direct mechanisms to translate and transform. There's no spin/lathe/revolve that I can see, or undo either. It's got parametric primitives; block, sphere, ellipsoid, coby murrayd - RepRap Host
LOL Sebastien. Or they're zoned like DVDs....by murrayd - Plastic Extruder Working Group