Earth two or more welders

[TH1983]

I have a welding bench, which I have connected the earth of my mig welder and tig welder

When welding can I damage one of the welders by having the 2 earths (1 per welder) connected at the same time?

Many thanks in advance

 

[amron]

I've done it many times - no harm so far.

 

[pedrobedro]

When they build ships they use more than one welder at a time

 

[Robotstar5]

I've seen lots of twin robot cells with both earths connected to the same fixture, at times they weld within inches of each other at the same time without any problems.

 

[brightspark]

the earth clamp is only only a ground return no matter how many conected no flow = no return

 

[matt1978]

The OP didn't mention what machines he has and I would assume its a Transformer based mig and a inverter Tig or MMA?

There are definitely issues if it would be two inverter based ACDC Tigs on the same job. You need special software to harmonise the switching. When one is in negative the other is in positive and so on. If not it can cause the inverters to blow with prolonged use.

 

[chevy2]

I have three earths connected to my bench,
One transformer type mig,
One inverter tig,
One inverter plasma,
Also have another separate 3m long earth lead thats bolted to the bench and the nearby chassis jig, that way theres no need to constantly move any of the three earth leads from bench to jig as it's all permanantly earthed.

 

[Lawnmowerboy]

We too have 3, Mig tig/stick and Plasma. No issues in the 3 yeas it's been like it!