XBM Navigator Blow Molding System Controls Contact Us Graham’s signature Navigator® control system is award-winning for a reason. This industrial PC-based computer control system facilitates integrated process control, with operators in mind. It allows monitoring and control of all machine functions and features, including downstream equipment. The XBM is explicitly engineered for extrusion blow molding control and integrated with field I/O for precise control. The slim, color touch panel provides a robust operator interface for our rotary wheel and accumulator head machines, and they are never more than two touches from any screen.