... (set include: marking machine, 3.5" LCDcontroller, 2 marking pins) CNC Automatic 3.5" LCD Touch Screen Marking MachineBasic principlesComputer controls ... , two marking pins, RS-232 and USB data line, 19 core cable, power line Return and feedbackI. As we do not have ... customers required.Free training installation and operation for the staffs. CNC Automatic 3.5" LCD Touch Screen Marking Machine