Profile tolerance

Your print shows profile only, which says it doesn't matter where this is as long as it holds its shape, If you think it to be necessary to show a plus value and a minus value in Xact, Then you need at least one Datum in my example Datum "C" is my Z surface so I am controlling my one direction but my "X" and "Y" of my scan has no particular place to be, so in the "x" and "Y" there is no set zero, until after the scan based off the hits with best fit creates it's own zero, hence the total value instead of the split value, in my example you'll see datum shift below, because my Datum "C" levels and constrains "Z". "Z" is allowed to Rotate but "X" and "Y" can not because of leveling Z and Z can not shift because "C" origins "Z" not allowing it to move, but "X" and "Y" are allow to shift (no particular place to be) . All this being said if you want to split the tolerance according to your print, and you want to use Xact, Then choose either Datum "D" or Datum "C" in your profile callout, and report your MAX and MIN, these are really your most important numbers anyways. If you use legacy the only choices you have is no constraint or all constraint. below is no constraint

Your print shows profile only, which says it doesn't matter where this is as long as it holds its shape, If you think it to be necessary to show a plus value and a minus value in Xact, Then you need at least one Datum in my example Datum "C" is my Z surface so I am controlling my one direction but my "X" and "Y" of my scan has no particular place to be, so in the "x" and "Y" there is no set zero, until after the scan based off the hits with best fit creates it's own zero, hence the total value instead of the split value, in my example you'll see datum shift below, because my Datum "C" levels and constrains "Z". "Z" is allowed to Rotate but "X" and "Y" can not because of leveling Z and Z can not shift because "C" origins "Z" not allowing it to move, but "X" and "Y" are allow to shift (no particular place to be) . All this being said if you want to split the tolerance according to your print, and you want to use Xact, Then choose either Datum "D" or Datum "C" in your profile callout, and report your MAX and MIN, these are really your most important numbers anyways. If you use legacy the only choices you have is no constraint or all constraint. below is no constraint