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# Re: [femm] Hang-up questions

- To: femm@yahoogroups.com
- Subject: Re: [femm] Hang-up questions
- From: David Meeker <dmeeker@ieee.org>
- Date: Thu, 02 May 2002 21:25:37 -0400
- References: <000001c1c5f1$122b43a0$0200a8c0@hirstmagnetics> <3CBFE604.42DB3CB0@gds-sistemas.com> <3CC412F2.30604@ieee.org> <3CC474E8.491AA6E@rdproducts.com>
- User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0rc1) Gecko/20020417

Tom Hansen wrote:

> `Hi Dave:
> I have been using this great program for awhile and often it works
> without hassles but occasionally when I import a dxf file there are
> small glitches. Usually the glitches are: double points, unconnected
> paths or very small areas of overlap. Sometimes these show up when
> doing the mesh, other times during the analysis where it will just hang
> and not signal an error. Is there a portion of the program that could
> do a "prior to run" error check that would flag these types of errors or
> log a snags list?
> Many Thanks,
> Tom
> `

Cribbing a bit from msg 514:
Femm could still use a little work on the dxf import filter, but a lot of problems stem from the fact that dxf is really just a drawing format rather than a finite element format. Problems like lines not quite meeting, points almost being coincident, etc, aren't problems for a drawing format, but they are a headache if you are trying to specify a consistent geometry. There's a really good explanation of problems and possible solutions w.r.t. dxf import on the IES website at http://www.integratedsoft.com/Demos/2DDXF/2DDXFImport.pdf Although this site is specifically about dxf import issues with IES Magneto, all of the wisdom applies to doing dxf imports in femm as well.

Dave.
--
David Meeker

- References:
  - RE: [femm] savebitmap error
    - From: "Robin Cornelius" <robin.cornelius@hirst-magnetics.com>
  - Lua questions
    - From: GDS <gds@gds-sistemas.com>
  - Re: [femm] Lua questions
    - From: David Meeker <dmeeker@ieee.org>
  - Re: [femm] Hang-up questions
    - From: Tom Hansen <tomh@sonic.net>

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