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Loopity Loops (and how to offset em')

Greetings fellow metrologists

I would like some help on my loop problem.
I have to create a loop to measure many parts simultaneously. I have done this before, but it was cylindrical parts, so it was quite easy to create the offsets in the loops.
But now i have this not-so-round part and its coordinatesystem doesnt match cmm axis
so im not quite sure how to go about this problem.
(see picture for part coordinates and how i will place them on the cmm). they will be placed in mulitple rows.

ty guys, u always help me

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  • It seems you have chosen to use one boss for one part and then one boss located at the next part. While it might be working without issues, I would choose the two bosses that are used for the same part (and align them in Y).

    I would go DCC after the "A_BASEPLATE" alignment. If you do, make sure to use clearplanes, via-points or whatever you use for steering clear in DCC, between the features (this is not autofeatures)!
    The loop should start here as well.

    Also, I would adjust the THEOs for the manually/learned features, especially the baseplate Z. The other ones that you don't have any THEOs for (threaded bosses and first part alignment) I would just round them off.

    The thing here is to align manually once off the threaded bosses, then move to DCC to measure the features for the first part alignment (learned features), make the part alignment so you can go off your CAD for the part measurement, then offset the alignment with the distance between the columns, repeat the first part alignment (but for the second part) and then do the part measurement.

    If you are feeling frisky and your parts are located perfectly, you might as well just offset the part alignment and go by that for all part measurements (not do the learned features measurement (in DCC) at all).

    1 - First alignment off of threaded bosses
    2 - DCC measurement of learned part features for part alignment
    3 - DCC measurement of part
    4 - Evaluate
    5 - Offset alignment
    6 - Return loop

    You can choose to start the loop between point 1 or point 2.
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  • It seems you have chosen to use one boss for one part and then one boss located at the next part. While it might be working without issues, I would choose the two bosses that are used for the same part (and align them in Y).

    I would go DCC after the "A_BASEPLATE" alignment. If you do, make sure to use clearplanes, via-points or whatever you use for steering clear in DCC, between the features (this is not autofeatures)!
    The loop should start here as well.

    Also, I would adjust the THEOs for the manually/learned features, especially the baseplate Z. The other ones that you don't have any THEOs for (threaded bosses and first part alignment) I would just round them off.

    The thing here is to align manually once off the threaded bosses, then move to DCC to measure the features for the first part alignment (learned features), make the part alignment so you can go off your CAD for the part measurement, then offset the alignment with the distance between the columns, repeat the first part alignment (but for the second part) and then do the part measurement.

    If you are feeling frisky and your parts are located perfectly, you might as well just offset the part alignment and go by that for all part measurements (not do the learned features measurement (in DCC) at all).

    1 - First alignment off of threaded bosses
    2 - DCC measurement of learned part features for part alignment
    3 - DCC measurement of part
    4 - Evaluate
    5 - Offset alignment
    6 - Return loop

    You can choose to start the loop between point 1 or point 2.
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