Meltio Engine Robot Integration. Large-scale Metal 3D Printing. The most affordable large-scale metal 3D printing solution, the Meltio Engine integrates with any robot arm manufacturer and interface on the market. 6 Lasers melt wire from all sides.High ComplexityCreate highly complex parts with infinite degrees of freedom.RetrofittingProvide new capability to any robot arm by turning it into a metal 3D printing system.Part RepairCost-effective component repair, part augmentation and feature addition.Large SizeNo inherent constraints when the working envelope is only limited by the size of the motion system.