Patent ID: 7049547

Claim:
Method of transmitting data between a welding device and another welding device which comprises controlling a welding process by means of a control system, supplying an arc with energy from a current source and striking the arc between a workpiece and a welding torch, supplying the welding device with power via a supply network, whereby the data is transmitted between the welding devices, transmitting the data, signals and welding parameters or synchronisation signals for one of the welding devices via a first communication unit across the supply network, whereupon the transmitted data, signals and welding parameters or synchronisation signals are read from the supply network by the other welding device and processed by means of a second communication unit and another data exchange is optionally run, and generating a synchronization signal by the one welding device at specific instants of the welding process so that the control system synchronizes control of the welding process on the basis of the synchronization signal.