Composite Positional Tolerancing? 1

[pmarc]

Hello,

Short question:
What is the difference in interpretation of following two cases of composite positional tolerancing?
I know what Y14.5M standard says, but I am afraid I am not able to visualize this difference properly.

Thanks a lot for any hint.

 

[SeasonLee]

Jim

A scan of the Exercise 20-1 from Alex' book had sent to inquiries@profileservices.ca

SeasonLee

 

[MechNorth]

Again, sorry for the delay, but ... it's Summer finally.

I've added to the PowerPoint Show file that I posted earlier, to show a few more variations for further discussion. Before anyone comments, yes, a couple of animations are out of order and some of the animations don't keep the "child" zones absolutely within the "parent" zones; PowerPoint isn't my favorite tool for functionality.

Anyway, I think that the graphics mostly speak for themselves as to what the controls mean. Hopefully it helps.

Jim Sykes, P.Eng, GDTP-S
Profile Services

http://www.profileservices.ca

TecEase, Inc.

http://www.tec-ease.com

 

[MechNorth]

Oops. Here's the link again.

http://www.profileservices.ca/files/tidbits/thd1103_252296.pps

Jim Sykes, P.Eng, GDTP-S
Profile Services

http://www.profileservices.ca

TecEase, Inc.

http://www.tec-ease.com

 

[MechNorth]

OK, and now for my next trick, I have embedded the GD&T font so that you can see the characters. (tks Evan)

http://www.profileservices.ca/files/tidbits/thd1103_252296.pps

Jim Sykes, P.Eng, GDTP-S
Profile Services

http://www.profileservices.ca

TecEase, Inc.

http://www.tec-ease.com

 

[SeasonLee]

Jim

Thanks for the valuable post, it worth an another star.
Thanks

SeasonLee

 

[MechNorth]

Tks. Glad it helps.

Jim Sykes, P.Eng, GDTP-S
Profile Services

http://www.profileservices.ca

TecEase, Inc.

http://www.tec-ease.com