If your point data represents the poles (instead of through points) we can accommodate that. The program reads 10 points at a time and creates a spline through the points. TEXT/'FILENAME FOR POINT INPUT',FNAMEX,RESP,DEFLT $$ ASK FOR FILENAME, MAKE SURE IT EXISTS: $$ THE DATA MUST BE X,Y,Z VALUES, SEPARATED BY COMMAS. $$ THIS PROGRAM CREATES POINTS FROM DATA IN A TEXT FILE. Regards RE: Unigraphics NX2: Spline and point data file demco (Automotive) 6 Feb 06 18:42 I find the advice of linking to Excel very valuable I'd like to try it myself if I had clear how it takes to do this. Other way: write a least-squares "smoothing" routine to optimize your cloud before passing it to UG: you would then be sure that all your points do belong to a coherent surface in this case, there is no reason why UG should create an ondulated surface.
![unigraphics nx unigraphics nx](https://proetools.com/wp-content/uploads/2013/07/bering02.jpg)
I found my method must be something like what is described in an old post from "Cloche" in this thread. In a model of a Francis turbine, which I created for my amusement, I use hermitian splines with only two nodes each, but with tangency and curvature control at each end of segment. My personal advice, which may or may not work in your case, is to reduce as far as possible the number of points, and control the geometry via first and/or second derivative conditions (i.e. Only a little bit of maths underlying the splines/surfs creation: in just a few words, the more the points, the higher the order of the spline / FF-surf, the higher the risk of local "self-oscillation" of the splines / isocurves. SS RE: Unigraphics NX2: Spline and point data file hvk (Aerospace) If your interested in this approach, let me know and I'll try to be more specific. You can have as many splines as you want associated with these points, and you can re-associate the splines to different points. In your situation, from what I understand so far (and I likely need more info btw), I'd create 1 sketch with all the points so your only dealing with 1.
UNIGRAPHICS NX UPDATE
If you want to change the spline geometry, just re-link UG to the new spreadsheet and update the part (tis a bit more complicated than this but you get the idea).
UNIGRAPHICS NX SERIES
These points drive a series of splines, which define the blade geometry (we use a combination of 'through curve' and 'swept' features to create sheets and then sew them together for the solid of the blades.).Įach point is defined by 3 values (x,y,z -or- radius, theta, z), and UG gets these values from a linked excel file. In a nutshell, your using an excel file to drive a series of associated points in a sketch. We use this for our impellors, and I don't see why this method can't be used in your application. You will, however, be able to use this on other parts so there is a good return on the work involved.
![unigraphics nx unigraphics nx](https://www.kleiostechnologies.com/wp-content/uploads/2021/09/UG-NX-Screenshot.jpg)
Here's an option that may work, although it will take some work to set up.