VOLTAGE BLOCK MONITORING SYSTEM

摘要

A coating system includes a source of electrically non-insulative coating material, a dispenser for dispensing the coating material toward an article to be coated thereby, and an electrostatic high potential supply for supplying charge to the coating material The high potential supply is coupled across the dispenser and the article. The coating system further includes a reservoir, a valve having a housing providing first, second, third and fourth ports, and a component movable within the housing and having a first passageway selectively to connect the first port to the secon d port to permit the flow of coating material between the first port and the second port. The first port is coupled to the coating material source. The second port is coupled to the reservoir. The third port is coupled to the dispenser. The component is movable within the housing selectively to connect the second port to the third port to permit the flow of coating material between the reservoir and the dispenser. The coatin g system includes a source of an electrically non-conductive fluid. The housing and t he first movable component define between them a second passageway. The source of electrically non-conductive fluid is coupled to the fourth port to provide a flow of the electrically non-conductive fluid from the sourceof electrically non- conductive fluid through the second passageway to flush coating material from surfaces of the housing and movable component adjacent the second passageway. Sensors sense: the flo w rate of the electrically non-conductive fluid and provide an indication when the flow rate of the electrically non-conductive fluid falls outside a desired range; the pressure of the electrically non-conductive fluid and provide an indication when the pressur e of the electrically non-conductive fluid falls outside a desired range; the pressur e of the coating material and provide an indication when the pressure of the coating material falls outside a desired range; and the current supplied from the potential supply to the valve and provide an indication when the current supplied from the potential supply to the valve falls outside a desired range.