Flatness – Surface vs. Feature of Size
Surface flatness is the type of flatness that most people are familiar with. On a drawing, the flatness callout can point straight to the surface with a leader arrow or be extended out from the surface and away from the feature of size.
Reverse Inspections of Orientation
I am trying to check the parallelism of the surface of a part in relation to Datum A. Is it acceptable to locate off of the surface of the part and indicate on the Datum A?
Composite Profile Control
Are the Datum structures in the two examples above valid for this drawing?If they are valid, wouldn’t both examples yield the same results when inspected?
