Composite Tolerance

I am having trouble understanding composite tolerance, especially when it comes to a bolt hole pattern like this. I am wondering how you would dimension these true positions. Here's my idea using legacy dimensioning:

Level and translate to A, rotate to B, and report the position of 1 hole (any hole?...lets say the 12'O'Clock hole) and give it a .001 tolerance. Then, would I stay leveled to A&B, translate to the hole that I just reported on (12'O'Clock hole), and report the positions of the rest of the holes with a .0005 tolerance?

Thanks so much...I prefer to use legacy...

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NinjaBadger over 2 years ago

Found example in 2009 version. Page 138 {"alt":"Click image for larger version Name:\ttempsnip.png Views:\t0 Size:\t322.3 KB ID:\t522150","data-align":"none","data-attachmentid":"522150","data-size":"small"}

However, assuming I'm reading this correctly, then Ninja Badgers post should read "For the lower segment in, use the above alignment, then just best fit, 3D ROTATION only to the 6 holes,"

No, for the lower segment the orientation of the DRF is constrained by Datums, hence translation only. Technically you could do a 3D translation but it will make no difference as we're dealing with cylindrical tolerance zones.
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NinjaBadger over 2 years ago

Found example in 2009 version. Page 138 {"alt":"Click image for larger version Name:\ttempsnip.png Views:\t0 Size:\t322.3 KB ID:\t522150","data-align":"none","data-attachmentid":"522150","data-size":"small"}

However, assuming I'm reading this correctly, then Ninja Badgers post should read "For the lower segment in, use the above alignment, then just best fit, 3D ROTATION only to the 6 holes,"

No, for the lower segment the orientation of the DRF is constrained by Datums, hence translation only. Technically you could do a 3D translation but it will make no difference as we're dealing with cylindrical tolerance zones.
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