Continuous Feature

[Bishbosh]

I have a machining fixture baseplate of 1800mm diameter by 50mm thick, the underside face mating to a machine bed has a flatness tolerance creating datum 'A'. On the top face there are 6 pillars with a flanged face mating to spot faces.
To control the depth of the spot faces relative to each other, is the preferred method to identify each spot face as a Continuous Feature. I have drawn a section through the plate and called up a parallel tolerance between the spot face and 'A'

Thanks.

 

[Belanger]

Since the depths are not what we call "features of size," I would probably lean away from using CF. It's usually better to use profile of a surface to accomplish that. If you have any reference books, look under "coplanar" features, which is a great use for profile.

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