GD&T concentricity different prob

[scottm]

I read over a very similar post to this one - but it doesn't seem to address my problem, but it is very similar.


I have two identical blocks with a hole through the middle in an assembly drawing. I want to call out concentricity between the two holes - so one bore surface is the datum, the other has the callout.


I can't get it to take the axis of block #2 as the datum reference, so I can get the whole callout, but with no reference. The blocks are the same part - pulled into two different locations on the assembly. Any suggestions?


Thanks,


Scott

 

[scottm]

I got it - but for the reference of any one else...


I needed to attach the datum reference to the dimension -A- instead of A... That seems to have done it.