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Gd&t and model based (MBD) drawing
- Thread starter Gerres
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Gerres,
For ASME Y14.5-2009, I don't think it is correct to apply "profile of a line" to an edge. As I understand it, the tolerance is meant to apply to line elements extracted from surfaces.
Whether datum features exist and are referenced by the profile tolerance should be based on functional requirements.
I don't think there's any difference between specifying "profile of a surface" with a general note or with an "all over" leader.
pylfrm
For ASME Y14.5-2009, I don't think it is correct to apply "profile of a line" to an edge. As I understand it, the tolerance is meant to apply to line elements extracted from surfaces.
Whether datum features exist and are referenced by the profile tolerance should be based on functional requirements.
I don't think there's any difference between specifying "profile of a surface" with a general note or with an "all over" leader.
pylfrm
Gerres,
I agree with pylfrm, I think the "profile of a line" should be removed. I also think No. 4 is most accurate for MBD, I would just remove the "Edges" with the "profile of a line" and keep the surfaces callout. Datum C can also have a "filled" circle at the end of the leader to callout on that surface. ASME Y14.41-2003 is a good standard for MBD.
I agree with pylfrm, I think the "profile of a line" should be removed. I also think No. 4 is most accurate for MBD, I would just remove the "Edges" with the "profile of a line" and keep the surfaces callout. Datum C can also have a "filled" circle at the end of the leader to callout on that surface. ASME Y14.41-2003 is a good standard for MBD.
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