Centre of Rotation for 3D pdf file

Hello all, I am having trouble with 3D pdf files rotating oddly and wondered if anyone can shed any light on the problem.  It seems when I include 3D content in my pdf files, the centre of rotation is miles away from the structure and as soon as I begin to rotate it the image appears blank.  From what I have read, the centre of rotation should be in the middle of the clipping planes.  Correct me if I am not understanding this correctly, but my model is a saved view with a clip volume and no camera on, so I was expecting it to rotate about the centre of the clip volume but this is not happening.  Any suggestions gratefully received. I have attached a sample of the problem.

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