Computer Aided Design
Computer Aided Design which is popularly know as CAD. In the early 70's Drafters, Designers and Engineers used to do Manual drafting with the help of Drafters and Drawing board. But as the time goes the benefit of CAD systems over manual drafting are the capabilities which often takes it from the computer systems today; Automatically generation of Bill of Material, Extraction of 2D drawings from the 3D model, Sectioning views, Dimensioning and various options in CAD software's through which we can produce output with almost 100 % of accuracy.CAD helps in increased design productivity by reducing the time for developing conceptual design, analysis and drafting. We can also reduce the manpower requirements for a given project. Previously Engineers were normally doing Engineering calculations by hand. During this transition, calculations were still performed either by hand or by those individuals who could run computer programs.
CAD was a revolutionary change in the Engineering industry where draftsmen, designers and engineering roles begin to merge. A finished set of drawings and documentation can be prepared in a relatively short time. Now a days if designers can design anything they will use various analysis software to get their calculated results efficiently and accurately rather than doing the same calculations manually and it will take lot of time to get the results. Those errors which occur during manual handling can be avoided in design, drafting and documentation with inherent capability of CAD systems. Now a days we are using various kinds of CAD software's which include 3D software's, 2D software, Simulation software's, FEA (Finite element analysis), CAM (Computer Aided & Manufacturing ) including instructions to Computer Numeric control (CNC) machines. There are several different types of CAD, each requiring the drafter to think differently about how to use them and design their virtual components. Like in AutoCAD 2D we can only draft and design two dimensional objects, whereas in AutoCAD 3D we can draft and design with three dimensional objects. Suppose if we want to create a box using AutoCAD 3D then first we need to create a rectangle then with the help of extrude command we can quickly convert it into the 3D box. This fast modeling of objects with graet accuracy only possible with the help of CAD softwares.Some of the graphics features of Computer Aided Design systems lend themselves especially well to the drafting process.
The big projects whether in Automation domain, Construction domain, Manufacturing domain, Real estate domain and BIM (Building information modeling) domain first the designs and modeling will be done in CAD software then they comes up into the field areas. In Film industry also CAD will play a big role. Like if we see in lots of animated movies the animated characters with their costumes, locations etc. everything comes up to be designed and modeled in a very known CAD software's. There are lot of CAD software's which animation industry will used like 3D Studio MAX, Maya, Photoshop, Corel Draw etc. Now a days VFX technology is very popular in the CAD industry. VFX or Visual FX is commonly known as Visual effects. Anything that is difficult to film in live action can be achieved using Visual effects. Normally in many Hollywood movies you can see the VFX technology. Like in Wolverine, Rise of the planet of Apes, The hobbit, 300 etc. The technology looks so realistic that if you watch in a movie it looks like it will exist as a real.
The developers developed with the advancement of object-oriented programming with the modern parametric feature based modeler and freedom surface systems are built around a number of key C modules with their own APIs. We can use CAD for all the major platforms like Windows, Linux, Windows Vista , Unix & Mac OS X.
Hence the CAD software enables engineers, Architects, drafters and designers to inspect and manage engineering projects with an integrated graphical user interface (GUI) on a personal computer system.