AFTER I DO AN INITIAL ALAIGNMENT A DCC ALIGNMENT AND MEASURE ALL THE FEAUTRES HOW THEN DO I ALIGN THS PROGRAM TO MATCH MY BLUEPRINT IN ORDER TO DEMINSION CORRECTLY?

A1 and A2 are Ø10 target areas on the top of two left hand pads.  Similarly, B1 & B2 are Ø10 target areas on the top of two right hand pads.  Datum A-B would then be a common datum made up of both sets of planes.  If the planes are all at the same Z height (not clear from the drawing) then you can just construct a single BFRE plane from all of the hits on A1, A2, B1 & B2 and use that for your alignment.  If A1 & A2 are at a different Z height than B1 & B2 then you would need to construct an offset plane for your alignment.  If you are using the geometric tolerance command then you need to construct one BFRE plane from all of the A1 & A2 hits and define that plane as datum A (DATDEF command), then construct one BFRE plane from all of the B1 & B2 hits and define that plane as datum B.  Then, from the datum definition dialog, you can select the "common datum" check box and select A & B to define the A-B common datum.  Datums C and D are 2 patterns of 3 holes each.  You need to measure all of the holes as cylinders and then, for each pattern, open the datum definition dialog, select all 3 cylinders and define the pattern as datum C or D respectively.  If you want to create an alignment that replicates a datum reference frame referencing C or D then it will need to include a 2D best-fit to the respective pattern of holes.

IM USING LEGACY DEMINSION DO THE SAME RULES APPLY FOR DEFINING THE COMMON DATUM

IM USING LEGACY DEMINSION DO THE SAME RULES APPLY FOR DEFINING THE COMMON DATUM