We are engaged in providing 3D Printing Service in Coimbatore, Tamil Nadu, India. 3D printing is a form of additive manufacturing. Objects are built in small layers, stacked on top of each other one at a time. It can be quite a slow process, but it does have many benefits. For comparison, a subtractive manufacturing process starts with a solid block of material, and removes bits until the final product is born. Some examples of this are marble sculpting and CNC milling (that's computer numerical control).
3D printers can be used to produce custom designed parts relatively quickly and cheaply, making 3D printers one of the best rapid prototyping tools. Using a 3D printer, a part can be cheaply designed and made, and then its design can be modified, printed, and tested multiple times in rapid succession before the part reaches full scale production.
Design programs like Tinker cad, Autodesk 123D are free and great for beginners interested in 3D design and 3D printing, while programs like SolidWorks and Autodesk Inventor are used by professional engineers to design parts and assemblies for production.