NX9 center of irregular 2D shape
NX9 center of irregular 2D shape
(OP)
Hi everyone,
I have a problem that I am unable to find a solution by myself.
I have a planar sketch, that contains 4 points and a closed spline drawn through all of these points, forming something close to ellipse or circle, but not quite. What I would like to do, is to create a point, that would sit right in the center of this shape and regenerate automatically, every time I change the shape. I have tried to use "bounded plane surface" command on the spline, to create a section, then plant a "point on face" on it, and tried messing with the settings for "U and V" to locate the point in the mass center of this surface, but with no luck.
Basically I have a lot of these irregular shapes (cross-sections) and I would like to draw a centerline through them all. But the trick is to have it automatically updating after every change in the cross-sections.
Is that possible in NX9?
Thanks in advance :)
I have a problem that I am unable to find a solution by myself.
I have a planar sketch, that contains 4 points and a closed spline drawn through all of these points, forming something close to ellipse or circle, but not quite. What I would like to do, is to create a point, that would sit right in the center of this shape and regenerate automatically, every time I change the shape. I have tried to use "bounded plane surface" command on the spline, to create a section, then plant a "point on face" on it, and tried messing with the settings for "U and V" to locate the point in the mass center of this surface, but with no luck.
Basically I have a lot of these irregular shapes (cross-sections) and I would like to draw a centerline through them all. But the trick is to have it automatically updating after every change in the cross-sections.
Is that possible in NX9?
Thanks in advance :)





RE: NX9 center of irregular 2D shape
Tim Flater
NX Designer
NX 9.0.3.4 Win7 Pro x64 SP1
Intel Xeon 2.53 GHz 6GB RAM
NVIDIA Quadro 4000 2GB
RE: NX9 center of irregular 2D shape
I think a better way would be locating a point in the mass center of a two-dimensional shape..
RE: NX9 center of irregular 2D shape
www.nxjournaling.com
RE: NX9 center of irregular 2D shape
The only thing I cant figure out is:
When using measure bodies, where exactly is the option to create a point at center of gravity? (CoG)
RE: NX9 center of irregular 2D shape
I was going from memory and thought that the "create principle axes" option had to be turned on to get the point, but this is not the case. Sorry for any confusion.
www.nxjournaling.com
RE: NX9 center of irregular 2D shape
Thanks a lot Cowski. And thank you Xwheelguy for the help too.
RE: NX9 center of irregular 2D shape
Everything works fine until I change my cross sections.
The symmetric extrude updates,
The body measurement also updates,
But the principal axes (center of gravity) stays right where it was.
And when I try to edit the body measurement, to recreate the axes, the option "create principal axes" is greyed out.
Any ideas on how can I make this update properly?
Thanks.
RE: NX9 center of irregular 2D shape
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: NX9 center of irregular 2D shape
www.nxjournaling.com
RE: NX9 center of irregular 2D shape
Since I will have 8 of these sections, it would seem a bit tiring to recreate the "measure body" feature every time I change the sections.
I will change the sections very often in order to meet a specific goal. Is there a way? Or should I think of upgrading to NX10?
RE: NX9 center of irregular 2D shape
Easy; start the studio spline command, choose the "through points" type option, pick the degree of the spline you want to create (if you are not sure, set it to degree 3), pick the points, press OK when done.
www.nxjournaling.com
RE: NX9 center of irregular 2D shape
These points, you just referred to - I can not generate them. Either I do not know how, or the only thing I can generate is the "principal axes" which are coordinate systems and do not contain any points.
Basically, I do not know how to create a point which is CoG and updates every time I change the section.
RE: NX9 center of irregular 2D shape
Thats a good thing I tried that again!!
Alright mates, it works. Thank you for the help :)
RE: NX9 center of irregular 2D shape
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.