... relief engraving CNC engraver 1.one plate with Five spindles, 2.steel gantry, high rigidity 3.sign making High efficiency relief engraving CNC ... choose vacuum table; Suitable Materials Wood, Plastic, Aluminum, Di-Bond, Engraving Board, Foamex. Engineering plastics, marble, acrylic, Perspex, PVC, Composite ... above subject to change without prior notice High efficiency relief engraving CNC engraver