Thanks. I was afraid of that. I guess "tag on datum" will get the tag in multiple views, but I am under the impression that tag attachment directly to the axis itself (and directly to the cross-hairs in end-on views) is not technically correct. Don't suppose it matters all that much.
Is anyone familiar with displaying datums in 2-D drawings. Specifically, if a datum axis is defined in the model ("set datum"), and placed, for example, "on feature" on the I.D. surface of a hole, the datum shows up in the drawing views that are "end on" to the datum axis itself (drawing plane...
Thanks for the feedback...so that I get this somewhat correctly, is it true then, that if a basic dim.,D, is given feature-to-feature across the center-line, there is an implied basic dimension from center-line to each feature that is 0.5D, subject to whatever positional tolerance I specify...
I am definitely using a central through hole FOS (together with the planar datums) to locate the plane of symmetry (horizontal origin).
My impression of using dimensions that span between the symmetric features is that doing so implies that in the inspection process you are physically measuring...
A simple situation, but I have not found explicit reference to it:
- Entirely symmetric part with many mirrored features.
- I believe functional (mating) emphasis requires horizontal dimensioning relative to a part center-line (planar primary and secondary datums, with tertiary datum plane of...
