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Thread: Generator for Arc Welder help
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27th September 2009, 05:18 PM #1Intermediate Member
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Generator for Arc Welder help
I have an Ozito Arc Welder 140amp model that I use. I also have a CIG MIG, but often grab the stick welder because it is more convenient.
I would like to use the Ozito out in the paddock but unsure of what generator rating is required. The Ozito has a 10 Amp plug and I rarely weld any more than 4mm thickness (usually 2 - 3 mm).
What size generator should I be looking for to drive the little Ozito and associated hand tools (grinder / drill) and maybe someday an Inverter stick welder (140/170Amp).
Any thoughts or recommendations are much appreciated!! Thanks!!
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28th September 2009, 09:37 PM #2GOLD MEMBER
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Would think 6KVA or bigger.
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28th September 2009, 09:39 PM #3
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28th September 2009, 09:56 PM #4Senior Member
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Bigger
Yep, agree with the other two. I tried using a 5 kva Honda generator with a 140amp CIG TransArc Tradesman stick welder and could only manage using the smallest CIG rods. Had a few light fittings to attach to the top of poles at the local rifle club at the time and was not impressed with the Honda generator at all. I sold that machine to a local bloke and invested in a Welder/ Generator for the back of the ute. That was a breeze to use, lots of power and good solid welds using the bigger rods.
DD
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28th September 2009, 10:38 PM #5SENIOR MEMBER
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yep bigger than 5 kva a 5 kva will work sort of but you have to be very confident with your arc starts
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29th September 2009, 09:24 AM #62-legged animal
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I lived for 15 years without mains power and did heaps of welding with a 2.5 kva using 2mm rods [ even2.5 mm rods would not run].As the generator got hotter and the resistance went up the rods would not run so good ,so a fine mist spray helped on a hot day .Also I took the governor off and had a throttle and flatened it while running an arc and idled it between rods etc
Running the generator at higher reves than standard gives a lot more amps and penetration and didnt
seem to affect the longevity of the welder .For that matter running drills and grinders at low revs on the generator didnt seem to harm them either.
A little light 2.5 was good because you could carry the generator in one hand and the welder/mask/ rods in the other.
See if they will let you try the welder on the generator first and if it runs rods ok then its big enough.
good luck --Mat
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3rd October 2009, 03:41 PM #7Senior Member
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- Quindanning, WA
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I have been using a 7kva with a 120 amp minimig for a few years no problem. Heaps of grunt for other power tools like cut off saws but not enough for a 3 hp compressor.
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