Patent ID: 6772040
Filing Date: 2004-08-03
Classification: B23K,H05H

Abstract:
An automatic process controller for a plasma arc system, the automatic process controller comprising:a first manifold; a first proportional flow control valve positioned upstream of the first manifold to control a cut gas flow to the first manifold; a second manifold; a second proportional flow control valve positioned upstream of the second manifold to control a shield gas flow to the second manifold; a first pressure transducer positioned downstream from the first manifold to measure a pressure of the cut gas exiting the first manifold; and a second pressure transducer positioned downstream from the second manifold to measure a pressure of the shield gas exiting the second manifold, wherein the first proportional flow control valve is adjustable based on the pressure of the cut gas measured by the first pressure transducer for controlling the flow of the cut gas, and the second proportional flow control valve is adjustable based on the pressure of the shield gas measured by the second pressure transducer for controlling the flow of the shield gas.