Splines in Sketcher?

[J-C]

When I do a "splines by points" in a sketch and select points in the background, the spline is not sketched in the X-Y only as all other sketch entities are, instead it actually creates it in 3d. Is this right? Shouldn't it project everything to the active sketch.

UG NX2

Jason Capriotti
Smith & Nephew, Inc.

 

[Xwheelguy]

Probably a bug with the sketcher's spline. I'd recommend using the Studio Spline, as you can choose the creation method (by poles or through points), make it associative (or not) to other geometry, assign higher than C1 continuity & control degree. It's a pretty powerful tool when used correctly, IMO.

If you're concerned about the spline not being in the sketch with connecting curves, have no worries. Just make the spline associative & it will retain the link to the sketch curve endpoints, midpoints, etc.



Tim Flater
Senior Designer
Enkei America, Inc.

http://www.enkei.com

 

[Azrael]

You can project the point to the sketch plane first. I don´t think it´s a bug, has always been like that. I would recommend setting upp the points in the sketch and then use studio spline.

 

[J-C]

Well it just "startled" me when I tried to extrude the sketch and it wouldn't because the two splines in the sketch were attached to points in the "Z" direction and there was a gap in the "Z" direction.

I'm used to Solidworks where every entity in the sketch is is in the 2d plane that defines the sketch.

You guys think this is bug, kind of a hassle to have to project the points into teh sketch for just splines. Lines, circles, and arcs do fine.

Jason Capriotti
Smith & Nephew, Inc.

 

[Xwheelguy]

I feel this should be looked into by calling GTAC (800)955-0000. If you are working in sketch mode, your projection plane should default to the sketch plane no matter what orientation the sketch is relative to the absolute csys. These are the types of things that repeatedly keep coming up with this "new & improved" NX line.

Tim Flater
Senior Designer
Enkei America, Inc.

http://www.enkei.com

 

[mjcole]

Jason,

Another option you may wish to consider is to create the spline entity as a feature and project it into the plane. This is less repetitive in terms of no. of points but may screw with the curvature of the spline.

The nice thing about UG sketcher is that you don't have two separate sketch types as on Solid Works which has 3D sketch and 2D sketch which are basically limited to their own functionality advantages and disadvantages.

Michael

 

[J-C]

Well Micheal, I find the Solidworks 2d sketcher far superior to UG (NX2) sketcher. Solidworks' 3d sketcher is not as useful as UGs curve functions though.

Not sure what you mean about the UG sketcher. It is a 2d sketcher right? Other than this 3d spline in the sketch deal which I'm not sure is a bug or not.

It seems you have the same kind of options in UG, a 2d sketcher like Solidworks, and the curve functions that don't use a sketch which Solidworks 3d sketch attempts to emulate.

Jason Capriotti
Smith & Nephew, Inc.

 

[Erland]

If using NX 2.0.4 or NX 3 (studio splines introduced), I would recommend not using splines in sketches.

Create Studio splines outside the sketch as individual features, and constrain them to geometry in sketches etc.


Erland R. Nielsen
Denmark