I have a question concerning the use of an A-B print alignment. First, I am using pcdmis 2022.1, cad and print, (cannot post a section of the print, not authorized, but I did the alignment). I am measuring a tube in automotive XYZ, datum A is in the X axis, datum B is in the Z. I take four vector points for each datum, use the best fit 3D, vector min max, rotate & translate, highlight the features and click compute. This is my manual alignment, points fall on the cad, all looks good. I then copy the manual alignment features and paste it after the alignment, change the id's and input the dcc and moves needed. I then run the dcc features and it measures the part, features are on the cad, I make a new BF alignment just like the manual and dimension the dcc features using the t value, tolerance ± .05mm and the results report less than .06mm. For a non-machined tube and using four points, I think this is good, measure the other features and they all seem reasonable for deviation. I then looked closely at the cad; it looks like the features (all) are minorly shifted in the Y axis (different deviations, not all the same). This is my question, what locks the alignment in the Y axis on a BF 3d? I am questioning myself to make sure I am not making a mistake. If you see an error, please let me know, or you have another way to align, I am open to try. Thanks in advance.
Odda
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