The Shop > Metal Stuff
Inverter or mig or indeed Tig
Fortis64:
--- Quote from: angus on March 25, 2018, 05:02:44 AM ---Fit a cooling fan in the case of your existing welder.... makes a lot of difference
--- End quote ---
Have tried this with not very good results .
Sean
PekkaNF:
I have upgraded my stick welder once. My first one was cheap and cherious AC only trasnformer. If you can weld with that you can weld with any MMA! It cut out all the time, had glue sticks like there is no tomorrow and generally was more pain than joy to work with.
My next one is Kemppi inververter, old/used/heavy, completely diferent than cerial boxes you buy on supermarkets. Long cables and doees not overheat not cuts out if the fuse is 20A, 16A single phase fuse blows if you weld hard and long, but the inverter hasn't cut out in Finnish weather. Very happy with weld quality and welding feels really easy now. Much more choice with stick too.
I tried a friends Telwin cereal box (size, weight and price) and it does welds fine. Alhough it does not weld biggest sticks that long, that would not really be my issue. The thing with that welder is that cables are very short, stiff, thin. You better keep the inverter in a crate, because othervice you will pull it with the cables and it will fall off the table. So 20% of the weight, 15% of the price and 70% of the usability.
I will not give up on stick welder, It's pretty much the only choice for weldable thick steel profiles on hobby market.
MIG and TIG are not interchangeable and what is really putting me off is the gas, it cost pretty much and if you need Mig and Tig, you really don't cope with one type of gas. But both works well thinner materials. If I would work with old cars, my first choice would be MIG.
My broher bough chinese TIG/MMA/Plasma unit. He tried plasma, never used the stick and is using only TIG, probably spent more on gas and consumables that on the base machine. He say's it is ok.
Pekka
Pekka
Fortis64:
I was at my recycling centre today and in the electrical container I spyed a Sealey mighty mig 150 .Had a quick look at it ,luckily I know one of the guys there so it just happened to find it's way into the back of my van :bugeye: :clap:.Gave it a going over in my shop ,and to me it looks like the wire feed motor is cappoot . Anyone know where I can source just the motor . Sealey are wanting £59 for the whole feed system which I don't really need ,or maybe the motor can't be bought on it's own .How would flux core work with this welder ,I've never used flux core before so I'm not up to speed . Some people say it's ok then the next says it's useless .
Sean
russ57:
Not an expert, but for gasless/flux wire you need to reverse the polarity.
I've read that in some conditions, gasless is Better, eg, windy.
Is it the motor or the control?
I also have a Chinese tig / mma/plasma. So far so good.
And a cheap gasless mig, I've used just a couple of times.
Mig gas needs co2 in the mix, as that acts as a flux, while tig requires pure argon as a shield.
I wonder if you can get a mixer to add co2 to argon?
The economics change by country and region, depending on how bottles are sold/rented/refilled.
Russell
Russ
Geoffm:
--- Quote from: Fortis64 on March 25, 2018, 11:49:56 AM ---I was at my recycling centre today and in the electrical container I spyed a Sealey mighty mig 150 .Had a quick look at it ,luckily I know one of the guys there so it just happened to find it's way into the back of my van :bugeye: :clap:.Gave it a going over in my shop ,and to me it looks like the wire feed motor is cappoot . Anyone know where I can source just the motor . Sealey are wanting £59 for the whole feed system which I don't really need ,or maybe the motor can't be bought on it's own .How would flux core work with this welder ,I've never used flux core before so I'm not up to speed . Some people say it's ok then the next says it's useless .
Sean
--- End quote ---
Look on Aliexpress. The chances are it is a 24v one and you will be able to find a replacement. E.g
https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20180330000536&SearchText=Mig+welder+motor
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