Composite Profile on Revolved Surface
Composite Profile on Revolved Surface
(OP)
I've pondered two approaches to what is being attempted to be described. The intent is to keep the orientation of the profile to the centerline, much like keeping a nameplate horizontal on the door while not being as concerned with it's location.





RE: Composite Profile on Revolved Surface
Thinking about location -- Proposal 1 locates the part around datum B within 0.1, while Proposal 2 also locates it within 0.1 (although only at point B).
Thinking about orientation -- Proposal 1 controls it within .028, while Proposal 2 does not; in fact the orientation is somewhat up for grabs in Proposal 2 because the position tolerance doesn't carry down onto the curve.
So my initial thinking is to go with Proposal 1. (An aside: to designate a tolerance between points A and B, you don't need the "PT" but just the letter. Also, in Proposal 2 you don't need the word "boundary" under the profile callout because profile is always a boundary idea.)
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Composite Profile on Revolved Surface
I was familiar with the point about "PT". Is "boundary" being dropped for 2009?
RE: Composite Profile on Revolved Surface
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems