# 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](/manufacturing-and-assembly/additive-manufacturing/3d-printing/fdm.md), [SLA](/manufacturing-and-assembly/additive-manufacturing/3d-printing/sla.md), and [SLS](/manufacturing-and-assembly/additive-manufacturing/3d-printing/sls.md). 3D printing can be used to create parts that have complex geometry that would be impossible to create on a mill or other machine. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://www.ftcwiki.org/manufacturing-and-assembly/additive-manufacturing/3d-printing.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.