Frames provide a strong, lightweight, and rigid structure for 3D printers, ensuring stability and precision during printing. Commonly made from extruded aluminum profiles, these frames offer excellent durability, resistance to vibrations, and ease of assembly. The modular design allows for easy upgrades and customization, making them popular in both DIY and professional-grade 3D printers. Aluminum frames also contribute to smoother motion and improved print accuracy by maintaining structural integrity over time.