Welding control

A welding device for applying weld material between two work pieces so as to connect the work pieces mechanically with one another, the welding device comprising:

• a welding head configured to perform a welding action in respect of the work pieces during transport of the welding device along an operating direction;
• and
• two primary sensor members arranged upstream of the welding head relative to the operating direction during said transport, wherein the primary sensor members being configured to register geometric properties of a spacing between the work pieces in which spacing the weld material is to be applied, and each primary sensor member being configured to be in contact with a respective wall of the two work pieces adjoining said spacing, a proximal end (SRp;
• SLp) of each primary sensor member being pivotably attached to a central element of the welding device, and each primary sensor member comprising a distal end configured to maintain contact with the respective adjoining wall during transport of the welding device along the operating direction while allowing variation of lateral distances between the central element and the adjoining walls, characterized in that the central element comprises one pivoting axis around which both the two primary sensor members are configured to be pivoted, and the pivoting axis is oriented essentially perpendicular to the operating direction.