Trouble driving parent child constraints 1

[bartbrejcha]

Im haviing a spot of bother driving parent child constraints with respect to splines.

What Im trying to accomplish is an Industrial designers trick of proving form. For example, Ill build a structure of parametric curves then tie 3 or 5 degree splines to those sketch structures as a separate sketch. I'm loosing my tangent/curvature upon manipulating the geometry.

Iv'e tried the studio curve w/ pols & w/o

Maybe Im doing something wrong or sketcher tangent is not to work like this.

Bart brejcha training consultant

http://www.designengine.com

 

[JohnRBaker]

Without an sample part there is really not much that anyone could say about what it is that you're attempting to do.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:

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

 

[bartbrejcha]

http://www.youtube.com/watch?v=Kd9FXxkAqi8&feature=c4-overview-vl&list=PL01A90C795B1977A2

Bart brejcha training consultant

http://www.designengine.com

 

[bartbrejcha]

http://www.youtube.com/watch?v=Kd9FXxkAqi8&feature=c4-overview-vl&list=PL01A90C795B1977A2

< Im basically trying to recreate this model with the same worklow characteristics. I want to adjust what I call the underlying curve geometry and the studio curves/splines update. Currently it seams my tangent dis-associates when I make changes.

I've got a hand full of industrial designers that have asked me to help them learn UG as their company has made a decision to drop solidworks and move to UG/NX

Bart brejcha training consultant

http://www.designengine.com

 

[bartbrejcha]

Curve is tangeny all in once sketch

once moved the spline is no longer tangent.



Bart brejcha training consultant

http://www.designengine.com

 

[cowski]

Try creating the spline through poles rather than through points; you'll gain more control that way. You may have to create the spline outside of the sketch for full control (some curvature constraints are not supported inside sketches).

www.nxjournaling.com

 

[JohnRBaker]

It would be best if you just provided the actual model!

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:

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