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Datum B as 2 cylinders


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Datum A is face and datum B is 2 cylinders.  There are several profiles on the top of the part to A and B with MMB.  Thought I could create a parallel cylinder but it is not available as secondary datum using Beta GD&T.  Any thoughts?

Screenshot 2025-03-21 095413.jpg

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Can you create a symmetry plane between the cylinders and perpendicular to A and use that? 

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Unfortunately, this won't help with regards to the MMB.

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With Beta GD&T you can check the option "Common datum" in element selection and there directly select both individual cylinders. The construction of a parallel cylinder is no longer needed here.

image.png.2715ea5f288876b4625728f858ab5a82.png

 

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Tom was assisting me with this issue, so thanks for the help.  I had a follow up question, if you had to do unequal distribution of a profile using the above datums how would you do that?  When using the GD&T Beta engine that drop down menu disappears.

  Screenshot2025-03-21115759.png.ab34da73e2adb31874bae9b1a44a720b.png

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I think I saw a mention in some intro video from Zeiss about Calypso 2024 that this unequal distribution doesn't exist yet in Beta GD&T Engine.

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