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Positional measurements that I don't understand.

Vladimir
Hi Colleagues, I am currently working on one part which is a circle with three ears. It has positional measurements, which I had difficulty with. They are marked in red in the attached photos.
As far as I understand, if the reference point is the central circle, then the controlled elements should be controlled only along the PR, but I can not understand how to represent this in Pcdmis.
I hope you can give me some tips for this.
PS
I use 2014 version PCdmis, and xact.
PPS
Datum D what is this??! Dia 100? But it's dat A in my opinion...Alien


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Parents
  • Is datum D used as a control someplace?
    In your snips, it looks like the only relevant datums being used in a control are A and C.
    --Engineers love to complicate prints with un-utilized datum callouts. The datum reference is noise until used in a FCF.
  • in reply to louisd
    Not, there is not a single mention of D in the entire drawing. Your idea that positions at 1.5 should be a profile seems quite acceptable, but it will be difficult for me to explain to other people who do not know how we live in the world of geometry, why I did it this way, not like in the drawing.
    Sometimes it seems to me that it is easier to give people the numbers of what is on the drawing (whatever they are) than to think what the designer meant and then also prove something.
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  • in reply to louisd
    Not, there is not a single mention of D in the entire drawing. Your idea that positions at 1.5 should be a profile seems quite acceptable, but it will be difficult for me to explain to other people who do not know how we live in the world of geometry, why I did it this way, not like in the drawing.
    Sometimes it seems to me that it is easier to give people the numbers of what is on the drawing (whatever they are) than to think what the designer meant and then also prove something.
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