×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Using BOUNDARY on an external FOS

Using BOUNDARY on an external FOS

Using BOUNDARY on an external FOS

(OP)
Something interesting that I just noticed, since I recently came across a real-world situation for it...

The Y14.5 standard goes into detail about how to use a position tolerance on a noncircular feature of size. See paragraph 7.4.5.
What's interesting is that all the verbiage is dealing with internal features, such as slots. But I'm trying to use the BOUNDARY idea on an external feature.
Look at 7.4.5.1 -- it says that if a position tol of a noncircular FOS applies at MMC, then the "following apply." Yet every one of the "following" is an internal FOS!

Was this an oversight, or did they intend for it to never apply to an external FOS? (And I'm not interested in using profile, so paragraph 8.8 doesn't really help.)

John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems

RE: Using BOUNDARY on an external FOS

J-P,
I am staring at fig. 7-34 and really can't see why the boundary approach could not be used if the elongated features were external and not internal.

Very interesting observation, by the way.

RE: Using BOUNDARY on an external FOS

(OP)
I agree that it can be done, it's just weird that they keep saying "internal" throughout that explanation. Oh well... extension of principles, right?

John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems

RE: Using BOUNDARY on an external FOS

JP,
You won't have to sell me on it! They have to
give us something to work with :)
Frank

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources