I just start to use Creo recently, and I've got an issue when I try to set the datum for detailing a GD@T drawing.
Following are my questions,
1) What is the best way to define datum in drawing?
I like to define datum with the toolbar in the drawing. It shall be quick in 2D. Someone say, it's better to build the datum first in 3D. I do not know why.
2) My current issue is
On a drawing, I used to define datum, A, B, C. One plane, and two cylinder holes as datum feature. For some reason, I deleted mark of datum B and C from the drawing. Now I want to re-add datum B but it does not allow it saying " same datum name exist". I check the 3D, there is an axis I built with a name B, in the last position of the tree. But I can not delete it. I can press the delete button. It just stay there.
And also, I went through the tree of drawing, I delete all the feature with name datum B. But still dose not work.
My estimation is maybe creo remember the B and C datum in its memory because I used to define it in drawing. Is this correct?
But How to fix this issue?
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