Sunday, September 07, 2008

How do I choose the right CAD program for me?

CAD Software

There are multiple Computer Aided Design Softwares available for design.  Generally people become familiar with one and stick with it.  As far as selecting the right one, my advice is this.  Most software companies have a free trial.30 day software trials are the standard.Take advantage of these free trial periods and check out the software.  Then at the end, decide if you want to try another software or stick with your best one.  I would advise you try out at least three different packages.


The one you select will probably have to do with you liking the interface or finding it intuitive.  Keep in mind it may work for you now.  A simple to use and understand interface probably has some limitations for your designs.  The very best programs are complex with many tools that give you the most control.I found out that when I start with a simple CAD program I quickly outgrow it.  At some point I move up to the next level of software.  This usually means a higher price as well.

Tools in CAD
Inside of your CAD program, you will have various tools that you can work with.  Many of these tools speed up your design times and make you more efficient.  Each CAD program will have similar tools and then unique tools that are only available with their package.  These specialty tools are one of the ways software manufacturers differentiate themselves in the marketplace.

Versions of computer aided design
There are different types of CAD out there.  These are the ones I deal with from time to time.  2D CAD, 2.5D CAD, and 3D Computer Aided Design.Here are some fast explanations of each computer aided design type.

2D CAD
2D CAD is generally on the low end of CAD software packages.  2D CAD is most often vector based.  The design consists on the X and Y-axis only.  The designs are made up of lines, circles, ovals, slots, curves, etc.  There is no “depth” to the design.  Only the outline of the part is visible, to put it in a different way.

2.5D CAD
All of the same descriptions above apply, but the design is prismatic.  By that I mean it has the depth of the material.  There are Z levels, but they are on singular planes.

3D CAD
3D CAD is on the high end of CAD software packages.  3D CAD can be solid based, wire frame based or nurbs based.  The design consists on the X, Y and Z-axis.  The designs are made up of lines, circles, ovals, slots, curves, etc, but can also include Spheres, Pyramids, Torrids, Cubes, etc.  There is depth to the design.  The design can be rotated around 360 degrees.  The design is an accurate description of what the part would look like if produced in the real world.

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1 comment:

Anonymous said...

I’ve always thought that the secret with CAD was to find a package that is relatively easy to get started with, but with use reveals depth not obvious at the start. File compatibility is also a big issue. The more formats that it reads and supports, the greater its usefulness.

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