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Can this tutorial help me?

Werkin
I've found this great tutorial on iterative alignment which was posted on this forum, http://cmmquarterly.mbccmm.com/index.php/training/pc-dmis/30-alignments-how-to and I've read it 10 times, but I'm not sure how it can lend itself to my current sheet metal part.

This is a rough representation of the part in question. Iterative_example.pdf

I can't seem to wrap my head around how I can pick 3 vector points as per the tutorial vs the print showing 3 points on 2 planes, and that it is still Datum -A-. Is it really that simple? Does iterative do all the work?
  • Hi Werkin,

    Yeah, Iterative alignment will do the work. You have CAD model imported correct?

    Well, just colect the 3 vector points using the mouse but don't measure them until you finish creating all the features needed
    for your alignment (2 circles with 3 sample hits). Once the features have been created theoretically mark all and execute.
  • I've got this working by either using 6 vector points, and just got it working with the 3 vector points as well as 2 circles, but my main question now is, how do I create Datum -A- using those 3 vector points? I have 6 features on this part print that are Position Dimension, 1.0, A|B|C.

    I get the B and C datums, they're just holes and I know how to assign them using "Datum Definition" but how do I define A1, A2 and A3 as DATUM -A-?
  • Create a set of the three points and use that as DATUM -A-, perhaps?
  • I've got this working by either using 6 vector points, and just got it working with the 3 vector points as well as 2 circles, but my main question now is, how do I create Datum -A- using those 3 vector points? I have 6 features on this part print that are Position Dimension, 1.0, A|B|C.

    I get the B and C datums, they're just holes and I know how to assign them using "Datum Definition" but how do I define A1, A2 and A3 as DATUM -A-?

    ??

    First 3 features A1, A2, A3 (sketch posted) are used to level the part and establish the orientation (Pcdmis does the iteration to best fit them)...This is your plane -A-
    If I'm missing something let me know.
  • I don't use exact very much. more of less at all but can you not pick those 3 points in exact and define it as datum A
  • So when doing an Iterative Alignment do you have to create features such as pln, lin, pnt or will just the points work? And It looks like in the article you have to create two alignments, point alignment with Iterative, and feature alignment with the features...is this how you do it, and is it this way with both Manual and DCC?
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