Mechanical Envelopes Min/Max dims vs Profile

[KevinNM]

I'm working on some Mechanical Envelope drawings. We typically use max dimensions to show the outer boundary of non-interface surfaces. And normal GD&T (position & profile) for interface surfaces.

My problem is, there are a few cable routing areas that are irregular shaped and oriented. I would really like to profile these surfaces but i don't care about the Least Material Condition. And i know that some areas that would be included in the profile will not be even close to the tolerance zone, but again i don't care.

Is there any way to do a "One Sided Profile"? I thought about a unilateral with an extremely large zone but that doesn't seem right.

Any thoughts?
~Kevin

 

[drawoh]

KevinNM,

Are these mechanical envelope drawings for your cable routing people, or are they fabrication drawings?

For an envelope drawing, all anybody would be interested in is LMC. I would not show a profile tolerance. Just say the hole is at least this big. Everything will be simpler.

--
JHG

 

[MechNorth]

If I understand you correctly, look into Position at MMC (Boundary) for controlling the boundary of a feature whose size is controlled by a profile control. It gets you the MMC boundary.

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

http://www.profileservices.ca

TecEase, Inc.

http://www.tec-ease.com