... stepping motor driver plus adjustable spindle speed controller Computer connection : on board palrallel portCommand code : G codeAcceptable software : Mach3 ,EMC2Protection ... ,acryplates,ABS resin double color plate,PVC foaming board,indentation plates,signs,construction models,instrument panels,wooden ... .2.Make sure that your computer has a on-board parallel port output.3.Installing a CNC control ...