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  1. #1
    Join Date
    Aug 2009
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    Sydney, NSW, Australia
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    Default Gave this a try out

    This is likely too cold too thick material too slow travel speed, material is old shaggy steel that has seen heaps of salt water its 2.5mm wall, i tried 80amps, 70amps, 60ampsthan settled on 40amps and i was able to hold the arc, the generator is a 2200watt (2000watt output) inverter generator

    Not sure what 40amps x volts? = watts

    This is just an experiment im hopping to pick up a bigger generator and link the two in parallel

    Trying to avoid getting another 15amp line installed as im renting and i lost my last 15amp install when i moved house
    Attached Images Attached Images

  2. #2
    Join Date
    Sep 2005
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    Bendigo
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    60
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    419

    Default

    Cleaning the material will do wonders for the end result.

  3. #3
    Join Date
    Oct 2011
    Location
    Norwood-ish, Adelaide
    Age
    59
    Posts
    6,541

    Default

    According to the manual, Unimig recommend a minimum 9KVa (effectively 9kW) generator to run the welder properly.

  4. #4
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
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    1,836

    Default

    Yeah i cleaned the steel with the angle grinder all that crap came up through the steel i had cleaned a strip about 30mm wide

    Yeah i understand the unimig requires a high kv generator but i will likely never run 4mm rods so i only need enough power to arc weld 2.3mm rods, tig 120-150amps, and mig

  5. #5
    Join Date
    Jul 2021
    Location
    South Australia
    Age
    58
    Posts
    33

    Default

    Good to know the Bunnings Fullboar 2.2kv genny will absorb that loading, as I have one as well.

    Would be good to see how it goes on some clean steel...

  6. #6
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
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    1,836

    Default

    The full boar generator is pretty neat nice and quiet i had it right beside me grinding and welding, i pulled that load from a single outlet

    I have a piece of new clean 2.5mm steel i could test out but it will have to be another day

    I think i need another 4kv a bit hard finding that kind of power in a carry generator, i'll be back with more results either when i get more power or i retest this setup

  7. #7
    Join Date
    Sep 2007
    Location
    Country West Oz
    Age
    77
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    169

    Default

    Quote Originally Posted by gazza2009au View Post

    This is just an experiment im hopping to pick up a bigger generator and link the two in parallel
    You might get some interesting results doing this, I wouldn't do it.
    Regards
    Bradford

  8. #8
    Join Date
    Oct 2007
    Location
    Alexandra Vic
    Age
    69
    Posts
    654

    Default

    Quote Originally Posted by BRADFORD View Post
    You might get some interesting results doing this, I wouldn't do it.
    Nor would I. I know that the Honda Inverter range can sync two units together, but they use a sync signal cable to ensure that one inverter is slaved to the other and producing the exact waveform that the master inverter is. I looked carefully at the Full Boar picture in the first post and don't see any provision for such a sync cable. Without the sync capability, there is no way to ensure that both units are producing identical waveforms at all times, and any variation in the voltage, frequency or phase of the waveforms will mean that one inverter generator is loading the other, rather than assisting it. Since the power is being supplied via semiconducters in the inverter, they cannot function in this manner and will self destruct.
    I used to be an engineer, I'm not an engineer any more, but on the really good days I can remember when I was.

  9. #9
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
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    1,836

    Default

    Manufacturers don't use regular 240v plugs because if one plug accidently pulls out the prongs are live, i'll try find another full boar geni

  10. #10
    Join Date
    Sep 2010
    Location
    Lebrina
    Posts
    1,910

    Default

    Joining two generators is a BAD idea unless they are designed for it such as the Honda inverter range.
    I can't understand why you are mucking around with this folly. Why not just buy one generator of the correct size or get a dedicated line fitted? The saying that a poor man pays twice holds very true.

  11. #11
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    Aug 2009
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    Sydney, NSW, Australia
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    Default

    Jump on youtube type in "parallel generators" we are way behind the USA in everything, there are heaps and heaps of videos on parallel generators of the same brand and different brands

  12. #12
    Join Date
    Sep 2005
    Location
    Bendigo
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    60
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    419

    Default

    Full Boar make parallel capable generators and also sell the cables to allow this to be done, the model shown in your pictures is an older model and does not appear to be compatible with paralleling.

    As others above have said you are likely to end up with dead generators if they are not compatible.

    Getting the phase sync in AC generation is critical, quite a few years ago one of the Hydro stations connected a generator to the rest of the grid before it was fully synchronised. The end result was a destroyed generator and many months of downtime while the manufacturer made replacement parts.

  13. #13
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    Aug 2009
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    Sydney, NSW, Australia
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    This geni was only $150, i can source a couple 3.500watt generators second hand same brand but they don't have the parallel cable the only way to hook them up will be the dead mans cable, the lids on generator output plugs are designed to snag on the back of a regular 10/15amp plug so the plug cannot just fall out thought i would clear that

    I looked at 8kv+ models but they are not silent generators and run at 105db compared to the 58db of a silent generator

  14. #14
    Join Date
    Sep 2005
    Location
    Bendigo
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    60
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    419

    Default

    Quote Originally Posted by gazza2009au View Post
    This geni was only $150, i can source a couple 3.500watt generators second hand same brand but they don't have the parallel cable the only way to hook them up will be the dead mans cable, the lids on generator output plugs are designed to snag on the back of a regular 10/15amp plug so the plug cannot just fall out thought i would clear that

    I looked at 8kv+ models but they are not silent generators and run at 105db compared to the 58db of a silent generator

    The parallel cable is to sync the AC phase of the generators, connecting the AC outlet sockets together with a “dead mans cable” does not sync the phases.

    If you want to destroy your generators please carry on.

  15. #15
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    Aug 2009
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    Sydney, NSW, Australia
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    Default

    There are a few videos already out there testing it

    https://youtu.be/bbvHjX1Of4g

    https://youtu.be/73uBSRpWREY

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