Re: Is there a defintion for Reverse Engineering?

From: John Wright (
Date: Wed May 06 1998 - 13:03:52 EEST

Prof . Bernard

We dont always need scanning and part duplication.
The first step is always - look at the job and simplify it - if you can
measure it with a vernier - use a vernier. If you want to simply duplicate
an item CAT scan it - pass it through Magics and build on an sla, fdm, lom,
sanders etc. Whilst RE is used to duplicate some items, it is usually used
as the basis of something new.

Best Regards

John Wright
Response Associates Ltd.


Tel: 44 1747 822404
Fax: 44 1747 822545
-----Original Message-----
From: Alain BERNARD <>
To: Volker Schillen <>
Cc: <>
Date: 06 May 1998 08:57
Subject: Re: Is there a defintion for Reverse Engineering?

Dear Volker,

I would like to propose the following :

the way to go from physical to numerical model

We need :
- sensor (with support structure, numerical or manual) and softwares for
filtering,adjustments, mapping,etc... (pixels, points, curves, polylines,
- then : 3D modelling software (surface, volume, feature, etc...)
- or : direct STL or ISO NC files for part manufacturing (very often you
have to make offset of the surfaces you have scanned before STL generation.
It depends on the case study. But for ISO NC files, it could be direct from
scan to file generation. Some additionnal functions shoulb applied, like
die lines modelling (using ruled surfaces for example obtained from point

An integrated software should do all these functions (like surfacer, CATIA
Cloud, STRIM 100 RDS, ProScanTools, etc...).

You need to define very carefully scanning strategies and the information
you choose to scan in order to be efficient for 3D modelling. Very often,
you have to scan some basic elements for general features modelling and
high density point clouds for details definition or ergonomic or
aerodynamic shapes definition.

I think that reverse engineering should be the first step for 3D copy of an
object in a futurist machine : you put your object at the entrance of the
machine and you obtain a 3D physical copy of your object at the exit of the
machine. We have already made such a process, but time and steps are a bit
long (a few hours) and not yet compatible with the patience you should have
waiting for your copy (like for paper copy, just a few seconds...)

I hope these feelings should help.

Best regards,


A 09:03 06/05/98 +0200, vous avez écrit :
>Dear RP'ler
>I try to find a definition for "Reverse Engineering". What are the
>necessary steps to do Reverse Engineering? Any suggestions?
>Volker Schillen
>Information Science Research Center at the University of Karlsruhe
>Mobility Management and Robotics Fon: ++49-721-9654-314
>Haid-und-Neu-Str. 10-14 Fax: ++49-721-9654-309
>D 76131 Karlsruhe (Germany) e-mail:
>Volker Schillen
> '''
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Prof. Alain BERNARD Tel : + 33 (0)3 83 91 27 29
Professeur des Universites + 33 (0)3 83 91 20 09
CRAN ESA CNRS 7039 Fax : + 33 (0)3 83 91 23 90
BP n° 239, 54506 - VANDOEUVRE Cedex - FRANCE
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