Patent ID: 11969835
Assignee: LINCOLN GLOBAL, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 5:
6. A system, comprising:
a welding power source including a controller comprising a processor, a user interface, and a memory, wherein the welding power source further includes a voltage feedback circuit including a voltage sensor configured to measure a voltage across a wire electrode and a workpiece and provide real-time voltage data to the controller, and a current feedback circuit including a current sensor configured to measure a current provided to the wire electrode and provide real-time current data to the controller,
a welding tool comprising a contact tip operably coupled to the welding power source; and
said wire electrode that is fed through the contact tip by a wire feeder, wherein a welding output at the contact tip comprises plurality of current pulses that are transferred to the wire electrode through the contact tip,
wherein the welding power source is configured to detect an arc flaring event by calculating a real-time welding arc impedance and comparing the real-time welding arc impedance or a rate of change of the real-time welding arc impedance to a threshold value, and adjust the welding output at the contact tip based on detecting the arc flaring event, and generate an arc flaring event warning message based on detecting the arc flaring event,
wherein the welding power source calculates the real-time welding arc impedance from a voltage measurement and a current measurement made during a tail end of a current pulse of said plurality of current pulses, wherein said tail end immediately precedes a subsequent current pulse of said plurality of current pulses and is 0.2 ms in duration, and
wherein the threshold value is a threshold impedance and the welding power source is configured to determine the threshold impedance based on respective averages of a plurality of voltage and current measurements, and wherein the arc flaring event is detected based on a determination that the real-time welding arc impedance exceeds the threshold impedance for a predefined time interval.