Additive manufacturing (AM), also known as 3D printing, is a process of creating a three-dimensional object from a digital file. AM works by adding material layer by layer until the object is complete. AM is often used to create prototypes, models, and other small objects.
Subtractive manufacturing (SM), also known as traditional manufacturing, is a process of creating a three-dimensional object by removing material from a block of material. SM is often used to create large, complex objects such as car parts and aircraft engines.
The key differences between AM and SM are as follows: