Choosing between FDM (Fused Deposition Modeling) and resin (SLA/DLP) 3D printing is one of the most important decisions for any maker. Both technologies have matured significantly, but they serve fundamentally different use cases.
FDM: The Workhorse
FDM printers build objects by extruding thermoplastic filament layer by layer. They excel at producing functional prototypes, mechanical parts, and large objects. With materials like PLA, PETG, ABS, and even carbon-fiber composites, FDM offers incredible versatility. Print speeds have skyrocketed with machines like the Bambu Lab X1 Carbon reaching 500mm/s.
Resin: The Detail King
Resin printers use UV light to cure liquid photopolymer, achieving layer heights as fine as 10 microns. This makes them ideal for miniatures, jewelry, dental models, and anything requiring ultra-smooth surfaces. The Phrozen Sonic Mega 8K and Elegoo Saturn 4 Ultra have pushed resolution to stunning levels.
The Bottom Line
For functional parts and large prints, go FDM. For detail-critical work and smooth finishes, choose resin. Many serious makers own both.
