Two earth conectors

[Mid Wales welder]

Quick question, why are there two earth lead connectors on my (and I thick every) mig welder? I'm guessing it's to do with torch positive/negative, but is that to do with welding different materials i.e aluminium? & which way round welds what? I don't actualy need to use it, am just interested to know. Any info would be great thanks.

 

[Paul.]

Most likely different connectors for changing the inductance, used when welding different material thicknesses, one effect is to control spatter, I had a migatronic 350 with 3 connectors on it

 

[Mid Wales welder]

Most likely different connectors for changing the inductance, used when welding different material thicknesses, one effect is to control spatter, I had a migatronic 350 with 3 connectors on it

Thanks for reply, yeh I did try switching it round but it seemed to weld exactly the same, but I only did two short T-fillet runs on 3mm mild steel.

 

[Lawnmowerboy]

hi i was wondering this on an esab machine at work theres an A and B earth socket

 

[Fazed]

I use a Migatronic 385 at work. The two earth sockets A and B are inductance outputs. A is for 0.8mm - 1mm wire, B is for 1.2mm - 1.6mm wire.
In reality, I never notice the difference between the two.

 

[Robotstar5]

Here's a Kemppi with 3 work returns, for higher current/material thickness use lower inductance.

 

[arceyered]

late reply

Here's a Kemppi with 3 work returns, for higher current/material thickness use lower inductance.

View attachment 25187

We used to run these kemppi's on the carousel at Thompson chassis, welding Disco frames .
They would run flat out none stop 24/7 great machine to be paired with.
All gone now robotics won the day but you will never beat the Mk1 human eye ball inmho the manual welded frames were far better than the ones welded by the robots.
Robot weld is only as good as the quality of parts and programer set up, a human can adjust to compensate on the fly.

 

[Engineer1964]

My Hobart has 3 earth Connectors, dependand on what amps your running at

 

[aametalmaster]

Robot weld is only as good as the quality of parts and programer set up, a human can adjust to compensate on the fly.

Thats for sure. And the big shots don't care on how it looks just get it done. Numbers numbers numbers is all they care about...Bob

 

[Tigman]

I have Oerlikon Citoarc it has two earths on it I use first for small amps and the second for high amps , it does make a difference to spatter !