kherman
Military
- Jan 21, 2014
- 20
I am on NX 10.
I am trying to make a swept feature that can twist and is curved.
The problem:
The shape as it is swept is not maintaining a rectangular cross section perpendicular to the guide's tangent. My worse case so far is that the "cross sections" can be a trapezoid with corners at 135 degrees. This issue manifest most notably at the center of the sweep.
What I am doing
There are two sections that are both rectangular. The rectangles can have different shapes. One could be 2x20 and the other 4x6.
I have a guide that is curved. It's start and end points are the centers of each rectangle. The start vectors are normal to the rectangle face. (a long winded way of saying that it is a centerline).
Default settings for swept except for what follows:
Interpolation is Cubic.
Alignment set to pattern
orientation is fixed
scaling is area law
law type is cubic
start cross section area is the area of the start rectangle
end cross section area is the area of the end rectangle
Solution?
I should be able to define a spine that should resolve this. Spine is greyed out tough. I read that I need two guides to do that. So I added a straight line to the start and end of the guide and tried that. The guide selection was still greyed out.
Spine selection:
Lets you select a spine curve.
Use a spine curve to control the orientation of the section strings and to avoid distortions caused by the uneven distribution of the parameters on the guides. A spine string works best when it is normal to the section strings.
More solutions?
I can not fathom that this is a unique problem that I am having. There must be a way to handle this. I just can not find the missing detail that I need.
Note:
For various reasons, I can not upload a prt file. I can include screen shots if needed.
UPDATE 1:
An image showing what is going on.
I am trying to make a swept feature that can twist and is curved.
The problem:
The shape as it is swept is not maintaining a rectangular cross section perpendicular to the guide's tangent. My worse case so far is that the "cross sections" can be a trapezoid with corners at 135 degrees. This issue manifest most notably at the center of the sweep.
What I am doing
There are two sections that are both rectangular. The rectangles can have different shapes. One could be 2x20 and the other 4x6.
I have a guide that is curved. It's start and end points are the centers of each rectangle. The start vectors are normal to the rectangle face. (a long winded way of saying that it is a centerline).
Default settings for swept except for what follows:
Interpolation is Cubic.
Alignment set to pattern
orientation is fixed
scaling is area law
law type is cubic
start cross section area is the area of the start rectangle
end cross section area is the area of the end rectangle
Solution?
I should be able to define a spine that should resolve this. Spine is greyed out tough. I read that I need two guides to do that. So I added a straight line to the start and end of the guide and tried that. The guide selection was still greyed out.
Spine selection:
Lets you select a spine curve.
Use a spine curve to control the orientation of the section strings and to avoid distortions caused by the uneven distribution of the parameters on the guides. A spine string works best when it is normal to the section strings.
More solutions?
I can not fathom that this is a unique problem that I am having. There must be a way to handle this. I just can not find the missing detail that I need.
Note:
For various reasons, I can not upload a prt file. I can include screen shots if needed.
UPDATE 1:
An image showing what is going on.
