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spline from points, NX7.5.5
- Thread starter turbineer
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- #2
To be more clear: I can't create a spline with the above method, and I'm looking for a method that works. I need something exact, not a fit spline. I understand there may be slope or tangency uncertainties, but I would like to start with the default geometry that NX would create from my point set.
I belive, that when you are asked for the start point, you already see your spline. Correct? If so, than there is no problem. Here is the description, of what is happening:
[ul]
[li]insert->curve->spline[/li]
[li]select through points[/li]
[li]select single segment[/li]
[li]select Points From File[/li]
[li]select the file and click OK[/li]
[li]the curve is now created. You should see the curve now.[/li]
[li]now, when you click on the OK command, you are creating new curve. And since you didn't select new file with point data, NX is asking you for a different method. And that is, selecting the points, that were created with sketch or with insert->datum/point->point.[/li]
[li]just close the dialogbox now, and you will have your curve.[/li]
[/ul]
Try this, to be convinced about this procedure:
[ul]
[li]draw five points anywhere[/li]
[li]insert->curve->spline[/li]
[li]select through points[/li]
[li]select single segment[/li]
[li]do not click on Points From File. Just click on OK. You are moved to the step, that is confusing you now.[/li]
[li]now, select Chain from All. You are now able to select start and end point.[/li]
[/ul]
I hope, that this explains and solves the problem.
[ul]
[li]insert->curve->spline[/li]
[li]select through points[/li]
[li]select single segment[/li]
[li]select Points From File[/li]
[li]select the file and click OK[/li]
[li]the curve is now created. You should see the curve now.[/li]
[li]now, when you click on the OK command, you are creating new curve. And since you didn't select new file with point data, NX is asking you for a different method. And that is, selecting the points, that were created with sketch or with insert->datum/point->point.[/li]
[li]just close the dialogbox now, and you will have your curve.[/li]
[/ul]
Try this, to be convinced about this procedure:
[ul]
[li]draw five points anywhere[/li]
[li]insert->curve->spline[/li]
[li]select through points[/li]
[li]select single segment[/li]
[li]do not click on Points From File. Just click on OK. You are moved to the step, that is confusing you now.[/li]
[li]now, select Chain from All. You are now able to select start and end point.[/li]
[/ul]
I hope, that this explains and solves the problem.
- Thread starter
- #6
Thanks for all the knowledgeable replies.
Sorry, I probably cannot show a picture.
Selection filter: I believe I checked that, but I cannot recheck it now for reasons related below.
Sven: Thanks to you for the same level of detail I offered. I am now getting a different behavior from NX. Although it would give me the points I expected yesterday from the same file, now I get an error dialog that I've exceeded the maximum degrees, and I don't see any points. My file has 112 points in it, and I see the grayed out number 111 in the degree box, but I don't think that is a needed parameter if you are inputting points by a file.
I think I'm to restart NX and see what happens.
Sorry, I probably cannot show a picture.
Selection filter: I believe I checked that, but I cannot recheck it now for reasons related below.
Sven: Thanks to you for the same level of detail I offered. I am now getting a different behavior from NX. Although it would give me the points I expected yesterday from the same file, now I get an error dialog that I've exceeded the maximum degrees, and I don't see any points. My file has 112 points in it, and I see the grayed out number 111 in the degree box, but I don't think that is a needed parameter if you are inputting points by a file.
I think I'm to restart NX and see what happens.
You won't be able to get a single segment spline through 112 points. Change the option to multi-segment and pick what degree you want, which will depend on what you are doing, but degree 3 or 5 is usually sufficient.
www.nxjournaling.com
www.nxjournaling.com
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- #9
Sven and Cowski,
this sequence:
insert->curve->spline
select through points
selectsingle multiple segments, degree 3
select Points From File
select the file and click OK
specify no constraints, and/or specify automatic slope
the curve is now created. You should see the curve now. I don't see the curve.
this sequence:
insert->curve->spline
select through points
select
select Points From File
select the file and click OK
specify no constraints, and/or specify automatic slope
It is possible that the spline is outside of your view clipping bounds. Regenerate the view and perform a fit after running the spline command.
www.nxjournaling.com
www.nxjournaling.com
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