A digital welder control system for controlling a portable gun welder of the type used in the automotive industry on an assembly line. An 8 bit microprocessor is the main control element of the system. The known cycle time of the microprocessor is used to generate a real time delay which in turn is used...http://www.google.de/patents/US4104724?utm_source=gb-gplus-sharePatent US4104724 - Digital welder control system
