Abstract: Method for compensating an interfering influence on a welding current, provided by a welding power source (4) for welding a workpiece (3), from another welding power source (4?), comprising the steps of: (a) providing (SA) a compensation voltage (UKomp), which is calculated on the basis of a welding current progression provided by the other welding power source (4?); (b) subtracting (SB) the compensation voltage (UKomp) from a measured voltage (UMess), measured by a voltage measurement unit (8) of the welding power source (4), so as to determine a corrected measured voltage (U?Mess); and (c) regulating (SC) the welding current generated by the welding power source (4) as a function of the corrected measured voltage (U?Mess).

Abstract: A method for preparing an automated welding method for a welding process moves a welding torch with a consumable welding wire during a movement phase at a positioning speed from an actual to a desired start position of a welding seam, and bridges the distance of the welding wire end from the workpiece during a creep phase. The creep phase is at least partially carried out during the movement phase. The wire is moved toward the workpiece at a first specified forward feed speed until a first wire end-workpiece contact is detected, moved away from the workpiece after first contact detection and then recurrently moved away from the workpiece, and the contact is interrupted again upon detection of further contacts, and the movement of the welding wire towards the workpiece and movement away from the workpiece after the contact is repeated until the start position is reached.

Abstract: A welding device and a short-circuit welding method uses successive welding cycles having respective arc and short-circuit phases. The method includes: conveying a welding wire from a workpiece, bringing the wire to a final rearward speed in a first rearward conveying phase and then conveying it at that speed until a second rearward conveying phase where the rearward speed is reduced; and conveying the wire toward the workpiece, the welding wire being brought to a final forward speed in a first forward conveying phase and being conveyed at that speed until the beginning of a second forward conveying phase where the forward speed is reduced. The first duration is adapted using a feedforward control and/or feedback control such that the welding wire does not exceed a specified reduced rearward speed in the second rearward conveying phase at the point in time at which the short-circuit is interrupted.

Abstract: Method for scanning a workpiece surface (2A) of a metal workpiece (2), in which a blowtorch (3) having a welding wire electrode (4) is moved relative to the workpiece surface (2A) to determine scanning values and a wire end (4A) of the welding wire electrode (4) is repeatedly moved towards the workpiece surface (2A), in each case until contact with the metal workpiece (2) at a scanning position (P) on the workpiece surface (2A) of the metal workpiece (2) is detected, and the wire end (4A) of the welding wire electrode (4) is subsequently moved back, the blowtorch (3) detecting scanning values (d) at scanning positions (P), at least in some cases multiple times, to determine scanning measurement errors.

Abstract: Method for compensating an interfering influence on a welding current, provided by a welding power source (4) for welding a workpiece (3), from another welding power source (4?), comprising the steps of: (a) providing (SA) a compensation voltage (UKomp), which is calculated on the basis of a welding current progression provided by the other welding power source (4?); (b) subtracting (SB) the compensation voltage (UKomp) from a measured voltage (UMess), measured by a voltage measurement unit (8) of the welding power source (4), so as to determine a corrected measured voltage (U?Mess); and (c) regulating (SC) the welding current generated by the welding power source (4) as a function of the corrected measured voltage (U?Mess).

Abstract: Method for scanning a workpiece surface (2A) of a metal workpiece (2), in which a blowtorch (3) having a welding wire electrode (4) is moved relative to the workpiece surface (2A) to determine scanning values and a wire end (4A) of the welding wire electrode (4) is repeatedly moved towards the workpiece surface (2A), in each case until contact with the metal workpiece (2) at a scanning position (P) on the workpiece surface (2A) of the metal workpiece (2) is detected, and the wire end (4A) of the welding wire electrode (4) is subsequently moved back, the blowtorch (3) detecting scanning values (d) at scanning positions (P), at least in some cases multiple times, to determine scanning measurement errors.