Each circle needs to be an individual path. Expanding the stroke won’t work so you need to create this manually. Just make one small circular path, set your centre point (by selecting the Rotation tool and Option/Alt clicking where you want the centre of the circle to be). In the resulting dialog box set a degree amount, then click Copy. Then just click Command/Control D to duplicate the path until you’ve formed a circle. Now you have a circle of circular paths which you can save and import into 3D Invigorator.
JD
John Dickinson
Motionworks
http://www.motionworks.com.au