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3D printing, also called as additive manufacturing, refers to processes used to create a 3D object in which continuous layers of material are formed under computer control machine to create an object. Objects can be of almost any shape or geometry and are produced using digital model data from a 3D model or another electronic data source such as an Additive Manufacturing File (AMF) file.

3D printing is the beginning of a third industrial revolution, succeeding the production line assembly that dominated manufacturing starting in the late 19th century.

The term “3D printing’s“ refers to a process that deposits a binder material onto a powder bed with inkjet printer heads layer by layer. Now, the term is being used in popular vernacular to encompass a wider variety of additive manufacturing techniques. United States and global Technical standards use the official term additive manufacturing for this broader sense. ISO/ASTM52900-15 defines seven categories of AM processes within its meaning: Binder Jetting, Directed Energy Deposition, Material Jetting, Powder Bed Fusion, Material Extrusion, Sheet Lamination and Vat Photo polymerization.

the action or process of making a physical object from a three-dimensional digital model, typically by laying down many thin layers of a material in succession.

“If we use 3D printing for prototypes then we will simply be able to go to market faster”. 

General principles 


3D printable models may be created with a computer-aided design, by a plain digital camera, via a 3D scannerand photogrammetry software. 3D printed models created with CAD result in reduced errors and can be corrected before printing, allowing verification and editing in the design of the object before it is printed.


Before printing a 3D model from an STL file, it must first be checked for errors. Once completed, the STL file needs to be processed by a software called a “slicer,” which converts the model into a series of thin layers and produces a G-code file containing instructions for a specific type of 3D printer (FDM printers). This G-code file can then be printed with 3D printing software (which loads the G-code, and uses it to control the 3D printer during the 3D printing process).


The printer-produced resolution is sufficient for many applications but printing a slightly oversized version of the desired object in standard resolution and then removing material with a higher-resolution subtractive process can achieve greater accuracy.

Some printable polymers such as ABS, allow the surface finish to be smoothed and improved using chemical vapor processes based on acetone or similar solvents. 


Rapid Prototyping





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