I have ten years experience on reverse engineering and using laser based
I will publish a state of art of reverse engineering in Boston (next
september) and TCT (next october). If interested, I can send you the papers.
Prof. A. BERNARD
A 11:22 30/07/99 +0100, vous avez écrit :
>I have just completed four years research into RE for industrial
applications. I have enclosed a file which lists about half of the
>I can give you some sensible pointers for hardware selection.
>1. Optical systems do not work well on reflective shiney surfaces, in most
cases some initial surface prep is required.
>2. Touch trigger systems are slower but give a good structured scanline
output. However you will struggle with re-entrant features (i.e. feature
not visible in the vertical plane).
>3. If you have an existing CMM machine you may look at some retrofit
solution (e.g. Hymarc (flying spot laser))
>4. Check out the accuracy and repeatability of scanning systems. Note: if
you are using a retrofit solution then you must consider the stack-up of
tolerances (scanner and CMM).
>5. Your biggest issue will be reading, filtering, aligning data sets.
Choose a software solution which deals with these processes well.
>6. You do not always need to get surfaces for manufacturing, a good RE
software solution should allow you to complete most tasks with a
triangulated point cloud.
>I work for Delcam Plc as CAD/CAM solution vendor. We have CopyCAD for
point processing, triangulation and surface generation (supported by TriFIX
an RP software tool), PowerSHAPE for RE surface development and Hybrid
modelling, PowerMILL which will create toolpaths directly from a triangle
model (no need for surfacing), and PowerINSPECT and ISO9002 compliant
inspection suit (dealing with large point cloud data sets). All the
products are OLE linked so importing and exporting is not required between
packages. We also support Visual Basic tools which will allow you to tailor
>If you need any more help give me a call.
>Tel: +44 (0)121 766 5544
>For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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