Re: I beg to differ Re: Stupid STL Question

From: Rolf Hubert (
Date: Thu Mar 21 2002 - 16:17:38 EET


I just got the tail end of this inquiry but if you are looking to change stl
files this can be done with Jewelcad. Import the file and change it within
Jewelcad. The file that is attached is a 3D scan of my face which was
generated from a 3D digital camera. The stl file created was a surface and
imported into Jewelcad. Jewelcad created a solid and I added a ring to it.
Jewelcad also has some interesting features like fixing stl files created by
Rhino, and many other surface modelers.

If you need more info, please contact me.

Rolf Hubert
VP of Sales & Marketing
Sanders Design International, Inc.
603-654-6100 x 314
----- Original Message -----
From: "Mr.Le Chi Hieu" <>
To: <>
Sent: Wednesday, March 20, 2002 11:17 AM
Subject: RE: I beg to differ Re: Stupid STL Question

> Hi,
> > STL input into Pro/E is optional with one of the
> > advanced surfacing packagesthat cost more money.
> Pro/ENgineer and UG (from version 18, UG17 or less can
> only view the STL files)provide some "editing" tools
> for STL files. Besides the expesive cost spent for the
> packages, the modelling process, however, requires
> lots of design skills (this must be taken into
> account, especially when the non-CAD/CAM people such
> as surgeons who would like to do Biomodeling as
> discused recently on the list) and times for the
> modeling of complex free-formed surfaces (the ones in
> Biomodeling).
> Because, to "edit" the STL files (not only Hollow,
> Boolean, Off-set, Cut etc.), we must convert the
> triangle mesh into the the parametric based
> representation (NURB or Free-Form sculpting, etc.);
> this can be done in the Reverse Engineering Software
> like Surfacer from Imageware. The Surfacer is also
> expensive too. In addition, if we would like to get a
> "nice" surface, we need to reconstruct the basic CAD
> entities (point, splines contours, etc.)from which the
> surface is modelled.
> Moreover,to edit the STL files by converting the
> triangle surface into the parametric based surfaces,
> normally we have to do that in the interactive way
> (manually editing). It takes lots of time and
> sometimes it is quite dificult to get the smooth
> free-form surface (or we have to expense the accuracy
> loss in the modelling). It sometimes also makes
> difficult for CAD/CAM manipulation during the design
> process because of the high degree of the mathematical
> description of the surfaces (a large amount number of
> control points used).
> I am waiting for some cheap tools to convert the STL
> surface into the "editable" surfaces, which are stable
> and familiar with the CAD/CAM designer: NURB based
> modelling (both surface and solid).
> With best regards,
> ------------------------------------
> Mr.Le Chi Hieu
> The Biomodeling Group, ISE.SAT.AIT
> Bangkok, Thailand
> Tel:66-2-524-6605
> Fax:66-2-524-5697
> __________________________________________________
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