> For the complete documentation index, see [llms.txt](https://promega.printm3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://promega.printm3d.com/advanced-setup-guides/printer-assemblies.md).

# Printer Assemblies

This guide will cover a significant amount of technical knowledge and terms. The different assemblies of the Promega will be mentioned frequently in the sections below.

List of the core Promega Assemblies:

* **Extruder Assembly**: This heats up and prints the filament. It is also referred to as the extruder carriage. This uses the coreXY system in order to travel in the X and Y plane.
* **CoreXY Assembly**: A belt system that allows the extruder carriage to travel on a plane along the X and Y axes.
* **Z-platform**: A heated bed that is actuated up and down with belts along the Z-axis.
* **Electronics (not shown):** Located on the back of the printer. Includes the Duet Maestro, the "brains" of the Promega.

![Promega Assemblies](/files/-LH1Zf0PJ6pzL2_V1ciO)

![The Duet Maestro Board](/files/-LH51pqx8aD6Uh_PadRQ)