# 3D Printing

A 3D printer creates parts by printing a part in many layers. There are many different types of 3D printers that all use different methods for printing their layers; the most common examples are [FDM](https://www.ftcwiki.org/manufacturing-and-assembly/additive-manufacturing/3d-printing/fdm), [SLA](https://www.ftcwiki.org/manufacturing-and-assembly/additive-manufacturing/3d-printing/sla), and [SLS](https://www.ftcwiki.org/manufacturing-and-assembly/additive-manufacturing/3d-printing/sls). 

3D printing can be used to create parts that have complex geometry that would be impossible to create on a mill or other machine.