Plane, Circle, Width Alignment ???

I have gained so much over the years from the contributors of this forum. Thank y'all for sharing your wisdom, knowledge, and experiences!

With that said, I would like your opinions on the attached crude drawing. It's third angle projection and in accordance with ASME Y14.5M-1994. The material at it's thickest point is 1 1/4". The total length of the part is 60". Here are the questions

1. How would you align this part for the position and profile call-outs back to ABC?
2. Since B is a huge diameter and C is a width, what would you use to rotate to?
3. PC-DMIS can't solve a constructed line from a circle/cylinder (B) to a width/mid-line/mid-plane (C). So what would you use instead to comply with the standard and satisfy the software?

There's some dissension here with regard to designer intent as well as compliance to the standard.

Thank y'all again for taking the time to share!!!

Attached Files

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VinniUSMC over 4 years ago

As a radius, B has a center point. Clocking then is from B (center point) to C (the midplane/line/point of the feature of size C).
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RIDER over 4 years ago in reply to VinniUSMC

I understand what you and KIRBSTER269 and A-machine-insp are all saying; however, checking the position of a hole pattern to an origin that is 14 feet away seems a bit drastic to say the least! Then we must factor in the accuracy of measuring datum feature B when we only have 19° of a 28 foot diameter!!
Couple that with the envelope principle of RFS for datum feature C and I'm still wondering the best way with the software to achieve the most accurate and precise measurements while complying with the standard.

Looking forward to y'alls thoughts!!
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RIDER over 4 years ago in reply to VinniUSMC

I understand what you and KIRBSTER269 and A-machine-insp are all saying; however, checking the position of a hole pattern to an origin that is 14 feet away seems a bit drastic to say the least! Then we must factor in the accuracy of measuring datum feature B when we only have 19° of a 28 foot diameter!!
Couple that with the envelope principle of RFS for datum feature C and I'm still wondering the best way with the software to achieve the most accurate and precise measurements while complying with the standard.

Looking forward to y'alls thoughts!!
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