Apply proper GD&T for "Keep In Zone"
Apply proper GD&T for "Keep In Zone"
(OP)
My issue is that I'm not 100% sure how properly dimension a "keep in zone" using GD&T.
This should be simple for someone who does this all the time... I however am not that guy.
Originally we set up the dimensions on a source control drawing as two MAXs and one MIN dimension. The idea was this defined a theoretical boundary the part had to sit in. Parts came in and they couldn't get a good measurement (some measurements were greater than 70°) so a functional gauge was made. The quality engineer said they couldn't accept the parts because the parts could have an angle greater than the 70° MAX.
I put together a slide that hopefully explains my issue in more mathematical details. Personally I'd just like to slap a flag note on each of the MIN and MAX dimension that states something like, "this dimension forms a virtual boundary condition used for a functional gauge." Or something along those lines. But I'm aware that this may not be the correct method...
I appreciate any help I can get.
This should be simple for someone who does this all the time... I however am not that guy.
Originally we set up the dimensions on a source control drawing as two MAXs and one MIN dimension. The idea was this defined a theoretical boundary the part had to sit in. Parts came in and they couldn't get a good measurement (some measurements were greater than 70°) so a functional gauge was made. The quality engineer said they couldn't accept the parts because the parts could have an angle greater than the 70° MAX.
I put together a slide that hopefully explains my issue in more mathematical details. Personally I'd just like to slap a flag note on each of the MIN and MAX dimension that states something like, "this dimension forms a virtual boundary condition used for a functional gauge." Or something along those lines. But I'm aware that this may not be the correct method...
I appreciate any help I can get.





RE: Apply proper GD&T for "Keep In Zone"
Without that, there's no telling what a correct response would be like.
RE: Apply proper GD&T for "Keep In Zone"
RE: Apply proper GD&T for "Keep In Zone"
I guess I could make a "no go" gauge...
Agree?
RE: Apply proper GD&T for "Keep In Zone"
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Apply proper GD&T for "Keep In Zone"
- What controls total width of the zone? As far as I see one basic dimension is missing in that direction.
- I am not sure I fully understand the description given, but as it is shown now the minimum total height of the zone can be .240 = .640-.200-.200. How is a dia. 250 cable going to fit inside that zone?