Thanks for reading and offering some insight. I'm working on a composite part that is a bear. I believe the drawing datum scheme is contributing to this but am not 100%. So, I was looking for some advice.
There is no issue with A. That is pretty solid. I believe my issues are stemming from Datums B and Datums C. Datum B consists of two pads that are apprx .72" wide. One of these towers 'float' in space for lack of a better analogy. These span apprx. 6.929" to the center of the holes in the faces. The print establishes this as one co planar datum. BUT then has surface profiles from B consisting of the co planar feature separately.
I do not beleive these features are totally co planar. I believe there is some shift present and this datum is not perfectly 'square'. Below is a reference photo of Datum B.
Here is a photo of the actual pads that make up B. You can see that they are slightly concave giving me a less than perfectly flat surface and slightly twisted.
Here is its counterpart
Datum C is basically the same as B but spans 4.530" to centers, and this has concave surfaces as well.
I beleive this is throwing my TP numbers off. When checking to theoreticals the parts are close, when applying datums, it gets dicey. Do you think the features that make up B and C are contributing to this? Anything I could do to try and resolve?
I appreciate your time and help.
