MIG-130 feed motor PCB GI-PCB-H59-A0 repair (old: Help me with capacitor replacement)

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  • Per Hansson
    Super Moderator
    • Jul 2005
    • 5895
    • Sweden
    #41
    Re: MIG-130 feed motor PCB GI-PCB-H59-A0 repair (old: Help me with capacitor replacem

    Nice work!
    I changed the thread title to make it more visible for Google searches...
    "The one who says it cannot be done should never interrupt the one who is doing it."

      Comment

      • redwire
        Badcaps Legend
        • Dec 2010
        • 3910
        • Canada
        #42
        Re: MIG-130 feed motor PCB GI-PCB-H59-A0 repair (old: Help me with capacitor replacem

        I noticed search engine's web crawlers are picking up the site, which is good for the tech and repairs.
        It's just a few minutes to figure what the feed motor board is doing and draw up a schematic. I couldn't see all parts/traces but got enough.
        A few boards burn up parts and welder-types not sure what the problem is to fix it. But defo need to add some transient protection, or spend more money on a better MIG welder.

          Comment

          • bohaboha
            Badcaps Legend
            • Nov 2012
            • 1003
            • sweden
            #43
            Re: MIG-130 feed motor PCB GI-PCB-H59-A0 repair (old: Help me with capacitor replacem

            Originally posted by Per Hansson
            Nice work!
            I changed the thread title to make it more visible for Google searches...
            very good idea thank you

              Comment

              • sam_sam_sam
                Badcaps Legend
                • Jul 2011
                • 6040
                • USA
                #44
                Re: MIG-130 feed motor PCB GI-PCB-H59-A0 repair (old: Help me with capacitor replacem

                Originally posted by redwire
                I noticed search engine's web crawlers are picking up the site, which is good for the tech and repairs.
                It's just a few minutes to figure what the feed motor board is doing and draw up a schematic. I couldn't see all parts/traces but got enough.
                A few boards burn up parts and welder-types not sure what the problem is to fix it. But defo need to add some transient protection, or spend more money on a better MIG welder.
                This is an issue with some very well known brands the feed motor circuit fry’s some portion of the circuit board for some reason I have repaired a couple of them that this type of failure but never figured out exactly what the issue was

                  Comment

                  • sam_sam_sam
                    Badcaps Legend
                    • Jul 2011
                    • 6040
                    • USA
                    #45
                    Re: MIG-130 feed motor PCB GI-PCB-H59-A0 repair (old: Help me with capacitor replacem

                    It should be repairable but be careful when removing the carbon from the board on both sides not to remove to much of the board material so you have something to work with and trying not to remove any of soldering traces if possible because the more of this you remove the harder it going to be to repair this board

                    I done this type of repair many times before in the past and had very good results but you have to have patience and can not be in a hurry to get the job done quickly because it will not be done correctly

                    Please let us know if you were able to get it back up and running again
                    Last edited by sam_sam_sam; 08-26-2022, 10:32 PM.

                      Comment

                      • jmribault
                        New Member
                        • Jan 2023
                        • 1
                        • United States
                        #46
                        Re: MIG-130 feed motor PCB GI-PCB-H59-A0 repair (old: Help me with capacitor replacem

                        So, that board is just to control the feed motor, controlled by the switch on the handle. I had the same issue and I simply replaced the board with a few things.

                        1 - a 12VDC / 2 amp power supply. I had plenty laying around. I had to modify the power line to ensure the that was powered from the AC.

                        2 - I replaced the speed potentiometer with a PWM 12VDC / 10 amp self-contained controller (https://www.amazon.com/mxuteuk-Contr...s_id=306530011)

                        3 - I opened and cut the trace in said controller between the on/off switch and the power to the 555 timer. There is a small trace there, but this is where I decided to solder the trigger switch.

                        This is involved, but that cost me a total of an hour of assembly and about $20.00 of parts). I had most of those, but there are some 12VDC PWM controllers with an on/off button available. The feed is super quiet and the PWM does a much better job of controlling the speed. No loss of power, so no large resistor and high current to waste and burn that board.

                          Comment

                          • sam_sam_sam
                            Badcaps Legend
                            • Jul 2011
                            • 6040
                            • USA
                            #47
                            Re: MIG-130 feed motor PCB GI-PCB-H59-A0 repair (old: Help me with capacitor replacem

                            Good work on coming up with a solution for this issue let hope that it can survive the harsh environment

                            One issue that can cause this is that the trigger switch wires could break and short to the high tension welding wire and burn up the speed controller board

                            One solution is to use a flat two wire cable and wire it directly from the trigger switch to the speed controller board on the high tension welding wire as your support for switch wires
                            Last edited by sam_sam_sam; 02-01-2023, 12:18 PM.

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