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  1. #1
    Join Date
    Apr 2020
    Location
    werribee
    Posts
    4

    Default 130 amp gas/gasless mig welder [rossi,edisons]

    hi,this welder was approx $ 230 two years ago.I Bought this unit just as a starting point to do small jobs around the house nothing too serious as it is only on a 10 amp plug.Anyway i did not receive a manual with this product,and after chasing this up with the ebay seller's they did not help me out in any way. I presumed that this welder was factory set for gasless welding so i started welding and it was not so bad for a beginner anyway. I have also wanted to try welding mild steel using a shielding gas,and again no help from the seller.On other mig welders it is a simple process to swap over the priority [negative and positive terminals] [torch positive clamp on negative] i am confused on what to do when i open up the box,as i do not want to get electricuted.
    I would appreciate some help on doing this the correct way,i know it maybe just a cheap welder to most here but i am desperate to get it going before i throw it through the window. And also is 75/25 argon and c02 the correct gas for mild steel. I will a photo up if it allows me to. All i can see inside the box is 2 black wires with 8mm nuts i am confused as i do not know if this is what i am supposed to swap around or not.

    I Will appreciate any help at all. My first project was fishing rod holders and small gadgets,and next hopefully an electric scooter.
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  2. #2
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    Hi Greg and welcome to the MetalWork forums.

    First of all some housekeeping before we talk about your welder.

    To explore the other areas of our forum here's a guide on to to navigate our Forum and find all the other forums and help pages.

    Goto the FORUM box in the top left hand cnr of the page and click the down arrow. This will bring up a pull down menu that has Forum Home at the top

    Click Forum Home which will present a scroll down page showing Forums and members help.
    Our rules,the Terms of Service are right at the top ,we encourage you read them.

    Below that are all the various help pages and subforums that make up our MetalWork forum.

    Your welding machine

    MIG stands for Metal Inert Gas. At the moment it is rigged as a Flux Core arc Welding machine, similar to, but not quite the same as a mig.

    In place of the gas for the mig, the wire on your machine is hollow and filled with a powdered flux. The arc it strikes is much the same as a conventional electrode (stick) welder arc in that the flux turns into a gas under welding temperatures and shields the molten arc. The completed bead has to be chipped off where as a mig bead does not require chipping as there is virtually no flux to chip.

    The controls on your machine are the bare minimum due to the cheap construction of the unit.
    The rotary dial controls the wire speed and volume of the arc. As you dial up the wire comes out faster and gives the arc a greater volume. The two rocker switches supply voltage.There are only 4 possible settings and it is this that limits your machine severely.

    The cables are connected as follows.The electrode connection-the gun cable- is attached to the positive + connection and the earth cable to the negative connector -.
    In Flux Core mode the gun does not require the nozzle.The gun is pulled for flux core where in MIg mode it is the other way but with the nozzle fitted.

    One of our members may have a similar unit with a set of instructions they can provide- have patience, someone might be along shortly.

    You could buy the equipment to convert the unit to MIG but frankly it will not be worth the trouble and expense.

    Welcome to the forum

    Grahame

  3. #3
    Join Date
    Dec 2018
    Location
    NSW
    Posts
    586

    Default

    Does it have the provision to attach a gas fitting to the rear or even front of the unit?
    I cannot see a gas solenoid in the inside pic.
    If it's a fixed torch design (most likely in this price point), then you'd probably even find that if there are no gas fittings on the machine, the torch too won't have a gas line to the torch body/diffuser.

    75/25 gas will work... but for the amperages and wire sizes you are going to be able to run with that machine, look for something around the 5% CO2 mark. With a small oxygen content. Assuming the above query checks out as OK.

  4. #4
    Join Date
    Apr 2020
    Location
    werribee
    Posts
    4

    Default

    Thanks for advice,and yes the welder has an outlet for gas at the back. I have bought the small tradeflame 86%Argon and 14 %Co2 from bunnings and mild steel .9mm wire[Bossweld Er70s-6]. as i said it is ony a starting point for me as i did not have a 15 amp power supply at the time. And yes it would be great for someone to direct me on how to change the terminals the correct way.I will put up an other photo or two.
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  5. #5
    Join Date
    Dec 2018
    Location
    NSW
    Posts
    586

    Default

    It might be as simple as undoing the main lug terminals that go to the negative socket, and the torch, while leaving all other wires connected to the correct polarity.
    Or it might just FUBAR your machine.
    Hard to say without having the manual. Are you certain it is set up out of the box for DCEN 'reverse polarity' ? It would be a first from what I've seen out there.

    Doesn't look like the kind of machine to have a heap of residual voltage stored in capacitors in there (AKA electrocution risk). But it goes without saying anything you do should be with machine disconnected from the wall outlet, and if at all possible power cycle it with the machine unplugged to remove any stray capacitance, if present.

    Personally, I'd leave it as is, give it a run with the expensive little throwaway bottle, and see you you go.

  6. #6
    Join Date
    Mar 2020
    Location
    Kogan, Qld
    Age
    83
    Posts
    7

    Default

    I have the same welder, and had the same problem - contacted Edison's and they eventually sent me a series of photos, all as clear as mud included removing the spool carrier and other vague instructions. Basically what I wanted to know was if it was set up for gasless welding.

    Attached are a couple of pics of mine, the red arrows show the wires you have to swap, yours may not look the same as the wires have been moved about to change them over.

    As is the ground wire comes out of the wire drive motor casing and the electrode from the front of the case and you just have to swap them over, the hardest part is getting the black insulator sleeves of and back on, the terminals are just bolted together inside the insulators, This is done on the RH side of the welder photo 2 shows the LH side and nothing there to alter.

    I had read that you had to reverse the polarity of the wire drive motor also, however that was not the case with mine.

    Hope I have explained clearly enough and that it solves your problem.

    Max
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  7. #7
    Join Date
    Apr 2020
    Location
    werribee
    Posts
    4

    Default

    [QUOTE=koganite;1965718]I have the same welder, and had the same problem - contacted Edison's and they eventually sent me a series of photos, all as clear as mud included removing the spool carrier and other vague instructions. Basically what I wanted to know was if it was set up for gasless welding.

    Attached are a couple of pics of mine, the red arrows show the wires you have to swap, yours may not look the same as the wires have been moved about to change them over.

    As is the ground wire comes out of the wire drive motor casing and the electrode from the front of the case and you just have to swap them over, the hardest part is getting the black insulator sleeves of and back on, the terminals are just bolted together inside the insulators, This is done on the RH side of the welder photo 2 shows the LH side and nothing there to alter.

    I had read that you had to reverse the polarity of the wire drive motor also, however that was not the case with mine.

    Hope I have explained clearly enough and that it solves your problem.





    Thanks for all that information ,with mine i had actually swapped around the two terminals over not just the the red and black wires so i may have done damage to the machine.I will try your way in the next day or so. Anyway did it make your welds any better,and did you use the same small bottle from bunnings 86/14 argon and co2. Also i am using .9mm wire as i changed the contact tip,and worked ok for gasless welding and i'm also going to use .9mm solid wire for gas welding when its up and running. I Bought this welder only for welding 1.6 mm tubing,but has welded beyond that. THANK YOU VERY MUCH.

  8. #8
    Join Date
    Mar 2020
    Location
    Kogan, Qld
    Age
    83
    Posts
    7

    Default

    [QUOTE=gregmaka;1965780]
    Quote Originally Posted by koganite View Post
    I have the same welder, and had the same problem - contacted Edison's and they eventually sent me a series of photos, all as clear as mud included removing the spool carrier and other vague instructions. Basically what I wanted to know was if it was set up for gasless welding.

    Attached are a couple of pics of mine, the red arrows show the wires you have to swap, yours may not look the same as the wires have been moved about to change them over.

    As is the ground wire comes out of the wire drive motor casing and the electrode from the front of the case and you just have to swap them over, the hardest part is getting the black insulator sleeves of and back on, the terminals are just bolted together inside the insulators, This is done on the RH side of the welder photo 2 shows the LH side and nothing there to alter.

    I had read that you had to reverse the polarity of the wire drive motor also, however that was not the case with mine.

    Hope I have explained clearly enough and that it solves your problem.





    Thanks for all that information ,with mine i had actually swapped around the two terminals over not just the the red and black wires so i may have done damage to the machine.I will try your way in the next day or so. Anyway did it make your welds any better,and did you use the same small bottle from bunnings 86/14 argon and co2. Also i am using .9mm wire as i changed the contact tip,and worked ok for gasless welding and i'm also going to use .9mm solid wire for gas welding when its up and running. I Bought this welder only for welding 1.6 mm tubing,but has welded beyond that. THANK YOU VERY MUCH.

    It did marginally improve the weld, not quite as much splatter, I think the biggest problem was coming to terms with the welder, something I am still working on, when you don't use it fairly regularly you don't develop a feeling for the process.
    I have only used it gasless, I couldn't justify the cost of the gas for the amount of work I do.

  9. #9
    Join Date
    Apr 2020
    Location
    werribee
    Posts
    4

    Default

    [QUOTE=koganite;1965830]
    Quote Originally Posted by gregmaka View Post


    It did marginally improve the weld, not quite as much splatter, I think the biggest problem was coming to terms with the welder, something I am still working on, when you don't use it fairly regularly you don't develop a feeling for the process.
    I have only used it gasless, I couldn't justify the cost of the gas for the amount of work I do.



    Thanks very much to all especially KOGANITE I have wired the mig welder the right way now for sure. I skipped using the gas that i bought,and just used gasless setup with Bosweld E712-GS welder setting on max and 1. This machine works very well on 1.6 mm tubing i cannot believe.Spot welds and fillet all look good and strong and have not blown a fuse yet. I had just about given up on this unit,and just using gasless does just what i wanted to active in the first place,i will try out the gas one day again,as it might work super as well. Thanks again team keep up the good work. [If i cant go fishing i might as well pass my time and practice welding ]

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