formandlocation

[Tested]

If there is no basic dimension to control location of a profile then it's just FORMONLY, correct.

[John Kingston]

Are you asking us, or telling us?

You are partially correct, but I couldn't resist.!LOL!

What does the symbol look like? An arc with no bottom, or with a line?

[Tested]

Asking cause someone is telling me.

[John Kingston]

Are you asking us, or telling us?

You are partially correct, but I couldn't resist.!LOL!

What does the symbol look like? An arc with no bottom, or with a line?

Sorry, couldn't resist. With the line means form & location, but if there is no basic there is an error on the drawing.

[rangerboat72]

Does it have a datum specified?

[Tested]

|profileofasurface|0.5|a|b(m)|c|

[Matthew D. Hoedeman]

Sorry, couldn't resist. With the line means form & location, but if there is no basic there is an error on the drawing.

ARC with a bottom line, is PROFILE OF A SURFACE (3-D)
ARC without the line is PROFILE OF A LINE (2-D)

Examples of this would be (sheet metal)

PROFILE OF A SURFACE for all the surface and profile of a line for the edge of the surface.

FORM and LOCAITON will come into play by way of the datums called out. No datums in the FCF (profile 1.0mm) is form only. IF even 1 datum is in the FCF, then it is form and location since it has to be held in relationship to said datum.

As for a basic dimension, there is no basic dimension for profile. There has to be a tolerance value, but no basic.

Geez, John, I would have thought you would have gotten that one!

[Matthew D. Hoedeman]

|profileofasurface|0.5|a|b(m)|c|

That callout out is FORM AND LOCATION, it has datum references in the FCF.

[Tested]

ARC with a bottom line, is PROFILE OF A SURFACE (3-D)
ARC without the line is PROFILE OF A LINE (2-D)

Examples of this would be (sheet metal)

PROFILE OF A SURFACE for all the surface and profile of a line for the edge of the surface.

FORM and LOCAITON will come into play by way of the datums called out. No datums in the FCF (profile 1.0mm) is form only. IF even 1 datum is in the FCF, then it is form and location since it has to be held in relationship to said datum.

As for a basic dimension, there is no basic dimension for profile. There has to be a tolerance value, but no basic.

Geez, John, I would have thought you would have gotten that one!

So this is not a good callout? ATTACH]1315[/ATTACH][

[Matthew D. Hoedeman]

So this is not a good callout? ATTACH]1315[/ATTACH][

I would say not, simply because the toleranced surface will NOT have any deviaiton to the A datum, it is perpendicular to the A datum. Maybe they wanted a perp. callout? I mean, check a point on that surface, is there any deviation in the axis that is the A datum? NOPE!

[Tested]

I would say not, simply because the toleranced surface will NOT have any deviaiton to the A datum, it is perpendicular to the A datum. Maybe they wanted a perp. callout? I mean, check a point on that surface, is there any deviation in the axis that is the A datum? NOPE!

But there is deviation "PERPENDICULAR" to it.
My GD&T book seem to suggest that if there are no Basics holding it's location then it is form only.
But if there are bacics holding it; it does say that now it's form and location.

[#2#]

I would agree that what they want is to control the surface perp. to datum A. Why they called it out that way I don't know. I don't think it is an invalid callout. Although, it would be much more clear if they had put a basic 90º in there. Kev, you want to weigh in on this one?

[John Kingston]

Geez, John, I would have thought you would have gotten that one!

I knew that! No clue what I was thinking.... I humbly apologize for my poor answer. I will not drink one beer this weekend as penance.

[T Miller]

I knew that! No clue what I was thinking.... I humbly apologize for my poor answer. I will not drink one beer this weekend as penance.

So how many are you drinking....

[Peter Warcholyk]

Or perhaps he might be imbibing in another type of alcoholic beverage!!

ZydecoPete