Re: Convert STL File to IGES file

From: Evan Kirby <>
Date: Mon, 3 Feb 2014 20:36:04 +0000


I actually just sat in part a Reverse Engineering webinar by SpaceClaim. What I saw looked amazing, you might give it a whirl.
Evan Kirby
Senior Application Engineer

44650 Helm Court - Plymouth, MI 48170 - USA
Tel: 734-259-6445 * Fax: 734-259-6441
Direct Tel: 734-259-6665 * Mobile: 248-895-1003

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From: [] On Behalf Of Crispin Weinberg
Sent: Sunday, February 02, 2014 8:41 AM
To: Tracy Taylor; Chatham Research;
Subject: Re: [rp-ml] Convert STL File to IGES file

Hi Doug,

Yes, Rhino is fine for simple shapes. For complex organic shapes like bones and blood vessels, we use reverse engineering software to make a STEP file and than can convert to IGES with any CAD software (SolidWorks, SpaceClaim, etc.).

As Tracy & Greg pointed out, it depends on your purpose. There will be some smoothing and loss of detail. Typically this produces a "dumb" solid. If you need a parametric model and it is not too complex, we can fit splines, but this takes longer and requires another level of approximation.

Feel free to send me your file(s) for a quote or give us a call. If the files are too big to e-mail, you may upload them on our website.

Best regards,
Crispin B. Weinberg, President
Biomedical Modeling Inc.
167 Corey Road, Suite 111
Boston MA 02135

Tel: 617-738-8168 or 1-888-246-6633
Fax: 617-738-8165 or 1-888-232-9246<><>

On 2/1/2014 1:33 PM, Tracy Taylor wrote:

Greg S. brings up a good point about using Rhino for the conversion. There is also a limit of 20,000 facets for such a conversion. For a complex organic shape it usually just won't work. However if the shape is reasonable simple Rhino can be a great tool. Once you use the "meshtonurb" command in Rhino you'll have a file that you can edit. You can then use the vertices of the facets to place curves on the model to create a nice smooth surface. It is a bit tedious, but if all you have is a rough STL file and need it smooth it works quite well. I did a model earlier this year that was so bad I needed to ask for dimensions because the designer used the defaults in ProE and it was beyond ugly.

As Greg S. said... What is the goal? Does it need to be surfaced, modified, etc....

Tracy Taylor

On 2/1/2014 9:24 AM, G. Sachs wrote:

That will force each facet to be made into a seperate surface - don't
want to do that. Besides, all part making machines can now use STL
directly (including CNC systems). So, not sure what the goal is here,
since you won't automatically get smoother surfaces.

G. Sachs

*From:* Greg <><>
*To:* Chathamres <><>
*Cc:*<>; Mike Wall <><>
*Sent:* Saturday, February 1, 2014 10:16 AM
*Subject:* Re: [rp-ml] Convert STL File to IGES file

Hi Doug,

Rhino <><> has a demo with 25 free saves that you
could use for that. Just *Import* it and then *Save As *an IGES. But
I'd suggest that you go with STEP instead.

Best Regards
Greg Pettengill
(321) 420-9037
Cell (321) 745-7843

Building sustainable agriculture, alternative economies and ways of
living that, contradictory and flawed as they sometimes might be, are
nonetheless experiments in ways of being free.
Raj Patel "Stuffed and Starved"

On Fri, Jan 31, 2014 at 6:29 PM, <<>
<><>> wrote:

    We are in need of a conversion service to transform an STL file that
    we have into an IGES file for creating an aluminum mold.
    Please respond to Doug at<> <><>

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Received on Tue Feb 04 2014 - 11:12:33 EET

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