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Thread: Gave this a try out
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17th Jul 2021, 11:43 AM #1Most Valued Member
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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
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17th Jul 2021, 12:02 PM #2
Cleaning the material will do wonders for the end result.
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17th Jul 2021, 12:03 PM #3Philomath in training
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According to the manual, Unimig recommend a minimum 9KVa (effectively 9kW) generator to run the welder properly.
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17th Jul 2021, 12:07 PM #4Most Valued Member
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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
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17th Jul 2021, 12:33 PM #5Intermediate Member
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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...
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17th Jul 2021, 12:53 PM #6Most Valued Member
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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
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18th Jul 2021, 02:21 AM #7Senior Member
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18th Jul 2021, 07:31 PM #8
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.
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18th Jul 2021, 08:06 PM #9Most Valued Member
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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
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18th Jul 2021, 08:59 PM #10Most Valued Member
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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.
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18th Jul 2021, 09:36 PM #11Most Valued Member
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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
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18th Jul 2021, 11:45 PM #12
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.
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19th Jul 2021, 12:06 AM #13Most Valued Member
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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
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19th Jul 2021, 12:21 AM #14
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19th Jul 2021, 12:29 AM #15Most Valued Member
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There are a few videos already out there testing it
https://youtu.be/bbvHjX1Of4g
https://youtu.be/73uBSRpWREY
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