Yes, the FCF would apply all-over, and unless the parts are full MBD the designer probably didn't intend that. My remark was more to clarify that you can use a FCF with no datums referenced.
As for the OPs problem, I agree it is ultimately QAs responsibility to raise the issue before parts are made.
The default note should not have datums in the FCF unless those datums are identified. If they are not identified, the model would should be considered basic (should state such in same note as default FCF) and the profile would be controlled to the basic model.
in the OPs example, the plane could go through points A2 and A3 with a dimension to A1 controlling the angle of the plane relative to the part.
You could also base the plane on point A1 and dimension to points A2 and A3.
What is missing from the figure taken from Y14.5 is the datum plane...
Your datum plane should be coincident with at least one datum target point with a dimension to each of the remaining target points.
Depending on how you need the plane orientation will determine the dimensional orientation between target points.
"Know the rules well, so you can break them...
A major reason to state how the drawing is defined is legal CYA. I always consider a drawing as a contract, and if the terms are not defined I can't push back when a supplier interprets it differently, other than not using that supplier in the future.
"Know the rules well, so you can break...
You do not need a datum structure to specify this dimension. It is shown and assumed to be a vertical dimension and only a tolerance is required.
Unless this is a feature whose horizontal location is important or is not addressed in some manner elsewhere, providing a datum structure is overkill...
Is there a company document defining drawing interpretation? How do the others in your department define miscellaneous symbols and notations? Are you allowed to use those symbols on your drawings without any definition? Do you have to spell out "DIAMETER", "DEPTH", and "COUNTERSINK"? How do the...
A basic dimension would require a datum to reference; straightness does not reference a datum.
"Know the rules well, so you can break them effectively."
-Dalai Lama XIV
NX1973
It has been a year or two since I remember using it but in drafting, when adding a note to the drawing, there was an option to add a relationship value from the model to your text (depth of feature, for instance).
Looking for it this morning the only options I see are Import/Export...
I would recommend NOT using +/- in the default note, instead using a profile tolerance without any datum reference and include the statement that the model is considered basic.
"Know the rules well, so you can break them effectively."
-Dalai Lama XIV
Board start here also... agree with not sweating the little stuff. One company I worked at near the beginning of my career had a practice of assigning datums in reverse (Z, Y, X instead of A, B, C) to avoid duplicating view/section letters. There should be a limit to dumbing down drawings for...
I have to agree if the original callout included all instances of an item.
If the item qty is broken up between various locations on the drawing, then there should be a hard qty callout at those locations. The intent would be that all hard qty callouts would add up to the total qty specified in...
I don't think applying a fix constraint to your primary component is a work around so much as good practice.
"Know the rules well, so you can break them effectively."
-Dalai Lama XIV
Typing mainly involves sequential 10 finger movement; mouse manipulation usually involves simultaneous squeezing and hand movement with intermittent 3 finger movement.
"Know the rules well, so you can break them effectively."
-Dalai Lama XIV
I have butted my head against similar issues when moving to a smaller, more manufacturing-oriented company... the value isn't seen by management as far as the bottom line, so much in-house process info that would otherwise be documented separately is combined with the base engineering definition...
Is this surface "as cast"? Is the drawing in question of the casting, or of the product of further processing?
"Know the rules well, so you can break them effectively."
-Dalai Lama XIV
Gr8blu,
That doesn't help the op who is obligated by the print to interpret per USAS Y14.5-66. To use a different version can affect original design intent.
edit: forum1103 may be a better place to ask
"Know the rules well, so you can break them effectively."
-Dalai Lama XIV