How can one describe the term "overhang" in 3D printing?

The term "overhang" in 3D printing refers specifically to a part of the print that extends out from the main body without sufficient support beneath it. This situation arises when a component of the model hangs out over the build surface, creating an angle that cannot be reliably printed without some form of support.

When 3D printers create layers, they require a solid foundation beneath each layer to ensure that the material can adhere properly and maintain its shape during the printing process. Overhangs typically exceed a certain angle, often around 45 degrees from the vertical, which can lead to issues such as sagging or collapse if support structures are not implemented. This necessitates the use of support material to hold the overhang in place throughout the printing process, preventing imperfections and failures in the final print.

Understanding this concept is essential for optimizing designs in additive manufacturing, as it impacts overall print quality, material usage, and time efficiency. While other terms may relate to different aspects of 3D printing, the need for support material specifically pertains to the challenge presented by overhangs.