... square guideway 5.DSP offline Stone CNC Engraving Machine ZK-9015 Application1.Suitable for natural marble, granite, bluestone, sandstone ... steel, iron, copper, aluminium, titanium alloy, can doing 3D embossment, and line engraving, bevelling, drilling 2D engraving.2. ... treatment, high rigidity, bearing strength better2.Dual motor driver for Y-axis, moving stably.3.Good software compatibility, ...