Due to its very stable construction, the High-Z CNC portal milling machine can even drill (limited to its cutting depth) high-grade steel, like V2A. It is no problem to engrave this material. Above example shows the cutting of a 1 mm strong stainless steel panel. It is certainly possible to also produce 3D items on steel and high-grade steel with appropriate applications.
Such ability at this price can only be obtained by the original High-Z machine due to the utmost accuracy in compiling mechanical components of the unit. Try this with one of the competing machines!