artnmotion,
How much control do you need?
I claim that the standard for drafting is what I inspectability. I send the drawing or some other documentation to the vendor. When the part comes back, I determine whether or not the part conforms to my documentation. The part is not inspectable if...
[ol]
[li]...the part is not fully dimensioned.[/li]
[li]...the drawing is not fully toleranced, and/or the tolerances are not achieveable.[/li]
[li]...drafting standards are not followed.[/li]
[li]...there is no way to inspect it.[/li]
[/ol]
In the absence of a drawing conforming to ASME Y14.5 or some other standard, you need some agreement as to how close the part must come to the model. My experience has been that a rapid prototyping firm will ignore the drawing and fabricate from the 3D[ ]model.
On an ASME Y14.5 compliant drawing, you can apply a note stating that any undimensioned feature must be fabricated to within a 1mm profile with respect to the model.
--
JHG
