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Issues w/ Profile of a Surface

rbronson87
Hi,

I'm having an issue with profile of a surface using Xact Dimensioning on a Romer arm If there's not datum called out in FCF the part passes no problem, if there's one Datum called out the part passes no problem but multiple (two datum) and my part starts to fail by huge margins (+- 0.300"). I've tried to correct this issue on multiple, unique parts but have had the same issue with the dimension failing, considerably (the dimensions are very passable, FCF tolerance is .060 for a laser cut part).

I'm wondering if there's something (most likely) that I did in my programming, a rookie mistake, or something that I'm missing. I align, define datums and take points using a CAD model.

Is it possible I'm having issues with the vectors being controlled by the second Datum?

I will happily post code, pictures, etc. if that will help.

thank you for your support!
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  • Creating a feature set with all the those features that include your origin and rotation features from your alignment will surely cause problems. I am not sure what the part is or how the print calls but maybe post that info if you still need assistance.

    I agree with Colin that it would probably be best to use scanning but again it depends on what required.
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  • Creating a feature set with all the those features that include your origin and rotation features from your alignment will surely cause problems. I am not sure what the part is or how the print calls but maybe post that info if you still need assistance.

    I agree with Colin that it would probably be best to use scanning but again it depends on what required.
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