... : marking machine, 3.5" LCDcontroller, 2 marking pins) CNC Automatic 3.5" LCD Touch Screen Marking MachineBasic principlesComputer controls ... , barcode reading marking, ticket, dot matrix, 2D code(two-dimension code), circumferential parts marking and connected to database marking ... LCD touch screen controller marking controller SparesAir pressure valve, two marking pins, RS-232 and USB data line, 19 ...