Auto-equalizing dimensions

[AZPete]

In NX4 I was able to use an auto-equalizing dimension set-up to self-center features (a hole pattern, for example).

Let's say you have a pair of holes side by side that should be centered between a left and right edge of a part. The hole space is dimensioned normally. The distance from the datum side to one hole is dimensioned normally. Here's where my recollection is fuzzy. The opposite side to the other hole is dimensioned normally, resulting in an over-dimensioned condition. Then, modify the overspecified dimension to look to the datum-to-hole dimension and auto-equalize the two. Any changes to the hole spacing or the width of the part, or both, results in self-centering of the hole pair.

Is this available in NX8, and if so, what is the path to the command?

Thanks,
-Peter

 

[Toost]

I can't say that i understand fully how you say you did it in NX4, but creating "autocentering" things in the sketcher is pretty simple and can be done in a number of ways. If the "autocentered" objects are points, then these can be selected for hole features for example.
example 1, create a number of points in the sketcher, dimension the points. Mirror the points.
example 2, create helper lines between "outer geometry" and curves in the sketch, finally apply "equal length" constraints to the lines.
example 3, create a helper line between 2 arc centers, then create a "midpoint" constraint to the helper line (midpoint) to some "center object".

Regards,
Tomas

 

[JohnRBaker]

Yes, if you supply us with at least a picture of what it is that you're attempting to create that would be very helpful.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
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Cypress, CA
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