... .5kw water cooling spindle 3. mach3 controller 4. stepper motor sign making machine Wide range of application: Such as seal, packing ... MaterialsEngrave and cut on Acrylic sheet, ABS double color sheet, PVC foam sheet,wooden sheet, scagliola, PCB Aluminum sheet, brass, steel, etc ... bits shank3.175-6mm Hot sale SM-4040M cnc metal sign making machine