How to use bridge curve radius constraint?

[NXMold]

I would like to set a minimum radius of a bridge curve, but no matter what I do the type/value fields are grayed out and unavailable. How can I use this feature?

NX 6.0.2.8 MoldWizard

 

[hudson888]

I don't know quite what you mean, however you may find that if you select your two curves or edges first then a few less options are greyed out and you may be able to select another method. Also as a result of preferential memory of your last use you may have to change the constraint type from G2 to G1 in order to allow that conic or reference curve methods can be used.

There is no method in bridge curves that controls minimum radius value as I understand it the values you may input relate more to percentages except for the rho value in the conic curve.

Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum

 

[NXMold]

See attached image. It gives me the distinct impression that I can specify a minimum radius, but it seems permanently disabled in the dialog.

NX 6.0.2.8 MoldWizard

 

[PheasantPlucker]

"Input curves must be coplaner" for that dialog to work

 

[hudson888]

It appears that that the radius methods do work with the Depth and Skew method but maybe only for co-planar inputs. It is so rare a case that I have never used it myself but I guess it is good to know that it is there nonetheless.

Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum

 

[NXMold]

Great, back to the original question then, how to use it?

My curves ARE coplanar (intersection of a plane and two surfaces) but the option never becomes available.

NX 6.0.2.8 MoldWizard

 

[cowski]

After you choose both of your input curves (with continuity set to G1 or higher) the radius constraint should become available.

Try it out by creating 2 arbitrary curves on the WCS. If that works for you, but it still doesn't work on the original curves - I'd take a closer look at the original 'intersection' curves. They may not be truly planar and/or coplanar. Also, if the original intersection curve is tolerant, NX may not be able to find a bridge curve (with radius constraint) solution within the specified modeling tolerance (just guessing here).

 

[NXMold]

I created a new model, inserted a block feature, and picked two paralel edges on the same face. G1 start and end. Still no dice, the radius constraint options are grayed out. Could this be a licensing problem?

If it works on your end maybe you could post a model to see if its editable here?

NX 6.0.2.8 MoldWizard

 

[hudson888]

I have attached a file that may be of some help.

Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum

 

[uwam2ie]

... look at this

 

[NXMold]

Hmm, interesting. It works with a sketch and several other lines, arcs, and splines I created. It won't work on the edges of a "block" feature, even if you extract the edge curves (guaranteed to be coplanar).

I instanced a sketch and rotated it 90° around 0,0,0 and I could still create a minimum radius bridge curve. I changed the rotation angle to 38° and NO DICE. I changed the rotation angle back to 90° and moved the rotation point off absolute zero, works fine.

So it looks like the input curves must be coplanar, AND that plane must be paralell with the WCS (or abs?). Some restrictions may apply, not valid in ME, NM, or WY.

NX 6.0.2.8 MoldWizard

 

[hudson888]

Make sure the lines aren't parallel with one another?

Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum