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I have a part that has a complex surface (free form surface/sculpted surface) which produces vectors in all 3 axis.
This surface acts as the primary datum in terms of how the part will seat/mate functionally in the assembly.
My intent is to identify this surface as Datum A with a profile tolerance which is essentially creating a virtual condition boundary for the form of the feature.
My question is - this is rather unorthodox and I am not sure how to identify the basic dimensions as they relate to datum A. I have not been able to find an example of this having been done before either.
Typically a datum control frame establishes a coordinate reference frame. If you consider the concept of a classical 3-2-1 control frame you have a plane, a line and a point constraining all 6 degrees of freedom. The plane and the line create the orientation of your coordinate frame and the convergence of the 3 features represents your origin point.
In my example all 6 degrees of freedom are constrained by Datum A. However, there is no flat plane that defines the orientation of my coordinate frame or location that represents my origin that is specific to the feature.
Any help?
This surface acts as the primary datum in terms of how the part will seat/mate functionally in the assembly.
My intent is to identify this surface as Datum A with a profile tolerance which is essentially creating a virtual condition boundary for the form of the feature.
My question is - this is rather unorthodox and I am not sure how to identify the basic dimensions as they relate to datum A. I have not been able to find an example of this having been done before either.
Typically a datum control frame establishes a coordinate reference frame. If you consider the concept of a classical 3-2-1 control frame you have a plane, a line and a point constraining all 6 degrees of freedom. The plane and the line create the orientation of your coordinate frame and the convergence of the 3 features represents your origin point.
In my example all 6 degrees of freedom are constrained by Datum A. However, there is no flat plane that defines the orientation of my coordinate frame or location that represents my origin that is specific to the feature.
Any help?