NX7.5 Drafting - How to attach GD&T Datum to cylindrical surface?

[4mranch6]

I have finally gotten around to posting this question after years of faking the following task. I have not been able to attach a GD&T Datum to a surface that is cylindrical (I.E.: The flat end of a shaft.), but instead to get around this issue I would Expand the view, add a line, and then attach the Datum to the new line.

Am I missing something or is this the only way to accomplish this?

Thanks in advance for the help.

 

[jerry1423]

No, you aren't missing anything, and I use a similar work-around to what you do.
When I am able I attach the datum to a dimension extension line.
I am interested in hearing what others have done too.

 

[4mranch6]

At least the attaching to a dimension extension line would make the datum callout somewhat associated. Thanks for the input jerry1423.

 

[JohnRBaker]

Have you tried this using the various 'Datum' leader Types, as shown below?

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

UG/NX Museum:

http://www.plmworld.org/p/cm/ld/fid=209

To an Engineer, the glass is twice as big as it needs to be.

 

[4mranch6]

Others will work by attaching to a dimension extention line, like previously mentioned, but I was specifically inquiring about the datum flag leader line. If it is not intended to work off of a cylindrical face then so be it, I was just wondering if I was missing something.

 

[JohnRBaker]

Do you mean like this:

When selecting the Leader 'Terminating Object' use QuickPick to get the actual 'Line' (Silhouette Curve) object as shown above. Or simply use either the 'Control Point' or the 'Point on Curve' Snap Point options (but NOT the 'Point on Face').

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

UG/NX Museum:

http://www.plmworld.org/p/cm/ld/fid=209

To an Engineer, the glass is twice as big as it needs to be.