Filament
Filament is the spooled thermoplastic material that an FDM 3D printer melts and extrudes to build objects.
Filament is the raw material of FDM printing — a thin strand of plastic wound on a spool. It comes in materials such as PLA, PETG, and ABS, each with different strength, temperature, and ease-of-printing characteristics.
Filament choice affects how a print looks, how strong it is, and how easy it is to produce. PLA is the common starting point because it prints easily, while tougher materials suit functional or outdoor parts.
FDM
FDM is a 3D printing method that builds objects layer by layer by extruding melted thermoplastic filament through a heated nozzle.
Infill
Infill is the internal lattice structure printed inside a 3D object to give it strength without filling it completely solid.
PLA
PLA is a common, plant-derived 3D printing filament valued for being easy to print, with modest heat resistance.
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