# US 10,500,671 B2 · System and method for arc welding and wire manipulation control > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,500,671 B2 - Document ID: US10500671B2 - Status: Granted - Kind: B2 - Application number: 15/481,251 - Filed: 2017-04-06 - Published: 2018-10-11 - Granted: 2019-12-10 - Earliest claimed: 2017-04-06 - Assignees: Lincoln Global, Inc. - Applicants: Lincoln Global, Inc. - Inventors: Judah Henry - Web page: https://patentgrep.com/patent/US10500671B2 ## CPC - B23K 9/125: {Feeding of electrodes (for stabilising arc B23K9/073)} - B23K 9/073: Stabilising the arc - B23K 9/09: Arrangements or circuits for arc welding with pulsed current or voltage - B23K 9/0953: {using computing means} - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM ## Abstract Embodiments of the present invention are directed to systems and methods of controlling wire feeding in a welding operation, where the wire feeding has a plurality of positive and negative pulses. Embodiments determine an average wire feed speed and compare the average to a desired wire feed speed and then change a parameter of the wire feed pulses to achieve a desired wire feed speed. ## Claims ### Claim 1 A welding system, comprising: a wire feeding mechanism having a wire drive mechanism which advances a welding wire and retracts said welding wire during a welding operation, where said advancement of said welding wire has a plurality of positive wire feed speed pulses and said retraction of said welding wire has a plurality of negative wire feed speed pulses, a wire feed speed detection circuit which detects a wire feed speed of said welding wire during said welding operation, and a controller coupled to said wire feeding mechanism and said wire feed speed detection circuit which determines an average wire feed speed for said welding operation based on said detected wire feed speed from said wire feed speed detection circuit, and where said controller compares said average wire feed speed with a desired average wire feed speed value, wherein each of said positive wire feed speed pulses have a first pulse parameter and each of said negative wire feed speed pulses have a second pulse parameter and said controller changes at least one of said first and second pulse parameters based on a comparison of said determined average wire feed speed and said desired average wire feed speed value, and wherein said welding operation has each of a welding arc voltage and a welding current and said first pulse parameter and said second pulse parameter are not directly regulated based on the welding arc voltage or the welding current, and wherein the welding arc voltage and the welding current are not directly controlled based on the first pulse parameter or the second pulse parameter. ### Claim 2 (depends on 1) The system of claim 1, wherein said first pulse parameter is a positive peak wire feed speed and said second pulse parameter is a negative peak wire feed speed. ### Claim 3 (depends on 1) The system of claim 1, wherein each of said welding arc voltage and said welding current are regulated independently from changing of said first pulse parameter or said second pulse parameter. ### Claim 4 (depends on 1) The system of claim 1, wherein said controller changes said at least one of said first pulse parameter and said second pulse parameter when said determined average wire feed speed is within a first range of said desired average wire feed speed, and wherein said controller changes both of said first pulse parameter and said second pulse parameter when said determined average wire feed speed is not within said first range. ### Claim 5 (depends on 1) The system of claim 1, wherein a frequency of said positive wire feed speed pulses is in a range of 50 to 200 Hz. ### Claim 6 (depends on 1) The system of claim 1, wherein said desired average wire feed speed is determined by said controller based on at least one of a desired deposition rate, a consumable type, a travel speed, a heat input, a welding process type and a weld process waveform. ### Claim 7 (depends on 4) The system of claim 4, wherein said first range is within 2 to 20% of said desired average wire feed speed. ### Claim 8 (depends on 4) The system of claim 4, wherein said first range is within 5 to 12% of said desired average wire feed speed. ### Claim 9 (depends on 4) The system of claim 4, wherein said first range is determined by said controller based on at least one input weld process parameter. ### Claim 10 A welding system, comprising: a wire feeding mechanism having a wire drive mechanism which advances a welding wire and retracts said welding wire during a welding operation, where said advancement of said welding wire has a plurality of positive wire feed speed pulses and said retraction of said welding wire has a plurality of negative wire feed speed pulses, a wire feed speed detection circuit which detects a wire feed speed of said welding wire during said welding operation, and a controller coupled to said wire feeding mechanism and said wire feed speed detection circuit which determines an average deposition rate for said welding operation based on said detected wire feed speed from said wire feed speed detection circuit, and where said controller compares said determined average deposition rate with a desired average deposition rate, wherein each of said positive wire feed speed pulses have a first pulse parameter and each of said negative wire feed speed pulses have a second pulse parameter and said controller changes at least one of said first pulse parameter and said second pulse parameter based on a comparison of said determined average deposition rate and said desired average deposition rate, and wherein said welding operation has each of a welding arc voltage and a welding current and said first pulse parameter and said second pulse parameter are not directly regulated based on the welding arc voltage or the welding current, and wherein the welding arc voltage and the welding current are not directly controlled based on the first pulse parameter or the second pulse parameter. ### Claim 11 (depends on 10) The system of claim 10, wherein said first pulse parameter is a positive peak wire feed speed and said second pulse parameter is a negative peak wire feed speed. ### Claim 12 (depends on 10) The system of claim 10, wherein said controller changes said at least one of said first pulse parameter and said second pulse parameter when said determined average deposition rate is within a first range of said desired average deposition rate, and wherein said controller changes both of said first pulse parameter and said second pulse parameter when said determined average deposition rate is not within said first range. ### Claim 13 A method of welding, comprising: advancing and retracting a welding wire during a welding operation, where said advancing of said welding wire uses a plurality of positive wire feed speed pulses and said retracting of said welding wire uses a plurality of negative wire feed speed pulses, where each of said positive wire feed speed pulses have a first pulse parameter and each of said negative wire feed speed pulses have a second pulse parameter; detecting a wire feed speed of said welding wire during said welding operation; determining an average wire feed speed for said welding operation based on said detected wire feed speed; comparing said determined average wire feed speed with a desired average wire feed speed value, changing at least one of said first pulse parameter and said second pulse parameter based on said comparison of said determined average wire feed speed and said desired average wire feed speed value, wherein said welding operation has each of a welding arc voltage and a welding current and said first pulse parameter and said second pulse parameter are not directly regulated based on the welding arc voltage or the welding current, and wherein the welding arc voltage and the welding current are not directly controlled based on the first pulse parameter or the second pulse parameter. ### Claim 14 (depends on 13) The method of claim 13, wherein said first pulse parameter is a positive peak wire feed speed and said second pulse parameter is a negative peak wire feed speed. ### Claim 15 (depends on 13) The method of claim 13, further comprising regulating each of the welding arc voltage and the welding current independently from changing of said first pulse parameter or said second pulse parameter. ### Claim 16 (depends on 13) The method of claim 13, wherein said changing of said at least one of said first pulse parameter and said second pulse parameter is when said determined average wire feed speed is within a first range of said desired average wire feed speed, and further comprising changing both of said first pulse parameter and said second pulse parameter when said determined average wire feed speed is not within said first range. ### Claim 17 (depends on 13) The method of claim 13, further comprising determining said desired average wire feed speed based on at least one of a desired deposition rate, a consumable type, a travel speed, a heat input, a welding process type and a weld process waveform. ### Claim 18 (depends on 16) The method of claim 16, wherein said first range is within 2 to 20% of said determined average wire feed speed. ### Claim 19 (depends on 16) The method of claim 16, wherein said first range is within 5 to 12% of said determined average wire feed speed. ### Claim 20 (depends on 16) The method of claim 16, wherein said first range is determined by said controller based on at least one input weld process parameter.