: Reverse Engineering



Feb 3, 2009

Reverse Engineering

During this session we started the reverse engineering process by scanning our toy car's parts by two different methods. This procedure was done by disassembling the main cover from the bottom with the mechanism. Once the screws were removed and the car was now divided into two parts, we took the cover and marked it with a pattern of grey tape stripes, in order to have a reference to identify the main points of the geometry so the scanning could be the most accurate possible.

MicroScribe 3D Digitizer.

After completing these previous steps, we are ready to scan with the MicroScribe 3D Digitizer:

1. First, the object is placed on the base with tape on the bottom so it doesn't move during the scanning.

2. Now we can start scanning by touching the main points of the object with the Digitizer's pointer.

3. We are able to control the points we want the computer to register by pressing the right pedal of the Digitizer (the left pedal's function is to activate or deactivate the scanning command).

4. Once we are done digitizing the object, we get in the computer something similar to the one we previously marked with stripes.

With these lines we can now have a good digital reference of the object to start creating surfaces and a virtual model of it.

Roland MDX-20 Modela

This is the other scanning process used for reverse engineering. This kind of digitizing is more accurate, so it takes longer.
In this case, the MDX-20 will be used to scan the inner part of the car's main cover.

1. We start by placing the object on the inside of the scanner with a special re-usable clay provided with the machine.

2. Now we use the Dr. Picza software to control the scanning properties and tell the machine what we exactly want.

3. Whenever it starts scanning, the needle moves around the object detecting specific points to generate a 3D model of the object.

4. Once the digitizing process is completed we save the file as IGES to be able to work with it in any 3D software.

posted by Ricardo @ 1:00 PM

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