Overhang
An overhang is a part of a 3D model that extends outward beyond the layer below it, which may require supports to print cleanly.
An overhang is any feature that juts out over empty space, such as the underside of an arch. Because each layer needs something beneath it, steep overhangs can sag or fail without support.
Printers can handle shallow overhangs unaided, but past a certain angle supports become necessary. Designers and makers manage overhangs through model orientation and support placement in the slicer.
Supports
Supports are temporary printed structures that hold up overhanging parts of a model during printing and are removed afterward.
Slicer
A slicer is software that converts a 3D model into the layer-by-layer instructions a 3D printer follows to build the object.
FDM
FDM is a 3D printing method that builds objects layer by layer by extruding melted thermoplastic filament through a heated nozzle.
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