Surveys

After thermoforming, cutting the extra material and painting both models, we aplied 40 surveys to different people so that we could choose one of them.

The results of the surveys are this:

As we can see, the car 1 won on most of the questions. However, we decided to pick the car2 because the only one on which this one won is on the 4th question. "¿In a competition, which one will probably win?" and we want to focus our design on that.

here are some pictures of the process I wrote on the last entry.
After thermoforming and cutting the extra material we painted the cars so that we could perform the surveys to pick the best design

Last tursday was our turn to use the Roland Machine. After the two models were done we had to accurate the form with sandpaper.
Now that both models are soft, we make some holes all around the car so that in the next proccess the air wouldn´t be a problem (the next step es thermoforming)

examn

last class we validate 2 files and sent them to the roland machine

after modeling 3 proposals we had to convert them into a stl file so that we could validate them on viscam. here are somo images of mi proposals and validating them on viscam

modeling

last class, we learned how to use some programs to validate our models. Viscam is a simple program were you put your models and automaticaly you can check if its good enough to be process it in the roland. It checks if the model has no holes or unmatched edges.
Then we learned how to configurate the Roland in the program Roland Modela Player4

After we scanned the car upstairs, we started to trace lines so that we can model our car in rhino.

the last two classes we learned how to use both machines to scan our cars. Basically, we had to scan our car, and in that process learn how both machines work.
Here are some images of the process:

About the presentations

SLA: Stereolitography
-Rapid prototyping
-1986 Charles W. Hull
-Prints thin layers with the ultraviolet laser
- You need a CAD program
- High accuracy, high surface quality
-Different materials
-Small prototypes
-The resin used for this prototypes is expensive ($400 per galon)
-Little tolerance
-Medical models
-Most widely used
-Requires post curing
-Support structures are required
-Odonthology: models of teeth

FDM: Fused deposition modeling
-Layer by layer
-Plastic filament or metal
-The material is melted
-You can use several materials depending on stregh and temperature resistance
-there are 4 kinds of FDM depending on the volume of the object

OPEN HARDWARE:
-Scial movement. Ideals of the 70´s
-People interested on tecnology created new devices by combining pieces from other different companies
-Replicated accesories
-REPRAP Machine
-Materials you can use:
-thermoplastic
-ceramic
-Icyng sugar
-silicone
-chocolate
-"Home printer" : cheaper than industrial maquines
-FABAHOME: project dedicated to this. You can build the machine at home

SLS: Selective laser sintering
-Rapid manufacturing process
-Speed and cost: advantage
-Industrial aplication: military-aerospace
-Automotive, sports, jewelry, dentistry
- use of some powder
-the waste of powder can be udes again
-Objects with accurate details
-Durable, funtional parts
-Material options:
-Nylon
- Glass filled nylon
- SLS FLEX
-METAL
-Fast
-cheap
-no support structure necessary
-You can produce parts (real ones) apart from prototypes
-density may vary

Thinking in prototypes

I found the article quite interesting because I didn´t know how common was to make a rapid prototype now a days.
A rapid prototype helps you to understand better how is the object and how to use it. To experience that with a rapid prototype it´s like drawing in 3D, something I though was a little bit far away.
The artycle also said that this kind of prototyping has compressed the design cycle but not abolished it. You have to continue doing the process of design because that´s the best way of getting a good result. If you try enough things, something will work out.
Rapid prototyping has replaced screen renders because, seeing just an image isnt enough anymore.
I think that this kind of tecnology will help designers to comunicate better their idea. For me, to learn how all this works, and to actually use it is something I´m really exciting about!