Surface Offset Difficulty
Surface Offset Difficulty
(OP)
Hello ... I am a new user of Unigraphics V18 and I am trying to offset a non-planar surface which has been successful in other areas, but for a few surfaces I receive the error message "Highlighted Faces Failed To Offset." Could someone explain to me what is preventing the surface from being offset and how I can work around it?
As a solution to this problem I have tried to use an extrusion to offset the surface and apply a thickness. This has worked, but I haven't found a method to 'sew' two solids together. Is that possible using Unigraphics?
Thanks for your help.
As a solution to this problem I have tried to use an extrusion to offset the surface and apply a thickness. This has worked, but I haven't found a method to 'sew' two solids together. Is that possible using Unigraphics?
Thanks for your help.





RE: Surface Offset Difficulty
There can be a number of reasons why a surface doesnt offset correctly. Is it imported? Is it sewn, or individual patches? Are there "tiny objects" or other discrepancies in the original surface. Would it intersect itself if offset?
As far as sewing solids together, you can use unite, or you can choose the solids for the input type in "Sew"
Hope that helps, if not I would be glad to look at it for you...
-Derek
RE: Surface Offset Difficulty
As Derek said there can be number of reasons
I think the offset value you are giving is more,as the surface is nonlinear there will be some overlap of the offset surfaces and the option fails
Try giving a less offset value.
Thanx,
karthikeyan.J
RE: Surface Offset Difficulty
Check then the minimum radius (Analysis->Mininum Radius...) of the surface so you know what´s a reasonable offset value. If there is a problem with small rads use Face analysis and check which region it is.
When you know what the problem is then we can talk about countermeasures
RE: Surface Offset Difficulty
To give you more information about the file I'm working with, it's a model of the human torso which is imported into Unigraphics as a body with a wire frame, but I can select the individual faces (as faces) or the whole body (as a solid body). As far as I can tell, the surfaces should not intersect when offset.
Thanks again,
Shan
RE: Surface Offset Difficulty
Shan
RE: Surface Offset Difficulty
Shan
RE: Surface Offset Difficulty
I would recommend you to fix/replace the original surface. If the problem is localy just cut it of and apply a new surface with through curve mesh (controlled end strings). If the problem is global then redo the surface, through curve mesh with the sorrounding surfaces and if you need more control strings extract the isoparamtric string of the original surface but check those spline before using.