Profile of a Surface Controlling a Boss Not Allowed?

[ModulusCT]

So I'm told that Profile of a Surface cannot control the boss on the surface in the image attached because the boss does not extend the full length of the face being controlled. Is that true? Instead, I'm told that size and position must be used to control the boss. Would the all over symbol be applicable here assuming the above is true (I'm guessing not because we're not controlling all around, just the profile).

So to be clear, we're talking about the profile tolerance that controls the profile from PA to PD. The true position and size dimensions on the boss on the top projected view are the correct way to control that feature I'm told.

Anyway, any thoughts are appreciated. Thanks.

Mod

I'm not a vegetarian because I dislike meat... I'm a vegetarian because I HATE plants!!

 

[ModulusCT]

Sorry, to clear things up a bit more (I realize it's a lot to look at), the profile tolerance in question is on the very top surface in the main plan view. I've highlighted the major players in the question and reattached the image below.

I'm not a vegetarian because I dislike meat... I'm a vegetarian because I HATE plants!!

 

[fsincox]

I will be supprised if a profile can not be used to control that boss, it does not now, in your drawing though!
Frank

 

[pmarc]

While I agree with the person saying that current profile FCF between PA and PD does not apply to the boss, I do not agree that the boss must be controlled by directly toleranced size and positional tolerance. Profile is an option too - the crux is to say this in an unambiguous way, and that is why I would not rely solely on the between PA & PD callout (as this may lead to a confusion), but add one more profile FCF to the contour of the boss (even if the tolerance is of the same value as the tolerance for yellow part of main contour).

 

[ModulusCT]

fsincox - Yes, this is the post-redlined state of the drawing. Before changing it, it looked the same except that all surfaces between PA and PD were controlled by the one FCF, which I think is OK.

pmarc - I agree. I do not personally find it to be ambiguous however, but if one designer / engineer can be confused by it, certainly there are others who will be as well... and probably even more machinists.

I'm keeping it the way it is in the drawings because the boss says that's the 'best' way... Fine, whatever. Good to know however that my line of thinking wasn't flawed... Can be improved though of course.

Thank you guys.

I'm not a vegetarian because I dislike meat... I'm a vegetarian because I HATE plants!!