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How To create a Co-ordinate system without a model vertex?

Question asked by Kristian Thompson on Jun 1, 2018
Latest reply on Jun 1, 2018 by Jody Holm

Hi,

 

Can somebody please tell me how to create a co-ordinate system like demonstrated in the picture below? I have been struggling with this for ages and simply do not know what selections I nee to make to get a co-ordinate system that is coincident with the top face of the model and concentric to the OD of the part.

 

XYZ.png

 

I know how to create co-ordinate systems when there is a vertex to select to position the origin, that is no problem, but what I am struggling with is there is no point (on the model) that is coincident with the top face and concentric to the OD of the part. I have tried creating a sketch and selecting a point in the sketch but it wont let me select the point.

 

Can somebody please give me clear instructions on what needs to be done as I am pulling my hair out.

 

Kind regards,

 

Kristian Thompson

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