Projected tangent plane -- What do you think?
Projected tangent plane -- What do you think?
(OP)
Here's a hand drawn sketch of a question I got a couple of months ago. I've been meaning to post it and just now remembered. Being that the only case of a projected tolerance zone of any kind in the 94 standard is shown as a special case of position I wonder if it's a stretch to use the same concept to project the tolerance zone of the tangent plane of a surface.
See the attached sketch and let me know if you think this is okay to do. If there is an example in the standard that I'm missing, please point me to it. Obviously the sketch is incomplete. I'm just trying to illustrate a point.
Thanks guys,
See the attached sketch and let me know if you think this is okay to do. If there is an example in the standard that I'm missing, please point me to it. Obviously the sketch is incomplete. I'm just trying to illustrate a point.
Thanks guys,
Powerhound, GDTP S-0731
Engineering Technician
Inventor 2010
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II





RE: Projected tangent plane -- What do you think?
I think there is nothing in Y14.5 standard that clearly prohibits what you have done.
Just out of curiosity, may I know what is the functional reason behind this? Is it really that only bottom surface of the slot has to be controlled such way? What about the top one?
RE: Projected tangent plane -- What do you think?
Powerhound, GDTP S-0731
Engineering Technician
Inventor 2010
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: Projected tangent plane -- What do you think?
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
http://www.gdtseminars.com
RE: Projected tangent plane -- What do you think?
One more comment: the legality of FCF is one thing, however (keeping in mind that the sketch is simplified) I would like to see how the slot's height is defined. Is it basic dimension or typical size dimension and what is the tolerance for it? This may complicate the situation a little bit.
RE: Projected tangent plane -- What do you think?
Powerhound, GDTP S-0731
Engineering Technician
Inventor 2010
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II