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DVS leaflet 2904 describes the controls and power components for resistance welding. The welding control is primarily used for the timing of welding current and electrode force according to the welding task of the respective spot, projection, seam or butt welding application. Depending on the design of the welding control system, the variables to be controlled are also regulated in addition to the control system. The control can be designed as constant or adaptive control. This depends on the requirements of the welding process and the quality. In addition, the controls differ in the range of functions, the possible options of the systems and the way they are operated.

Here, the welding applications are decisive for the selection of the control and its functional content. Depending on the production organisation, a distinction is made between automated and manual workstations and also in the quality requirements for the welded part. As a rule, the welding controls are of universal design. This means that they can be used for manual workstations as well as for robot lines.

The technical adaptation of higher-level controls or direct operation on manual guns or machines is realised via different interfaces of the welding control. According to the quality requirements, controls can be activated in modern welding controllers.

The welding controller can be housed and operated together with the power section and, in some applications, also with the welding transformer in one housing. Separate operation as stand-alone components is also possible and advantageous depending on the application.