General welding questions that dont fit in TIG, MIG, Stick, or Certification etc.
Hey guys I have a really kind of dumb question, but can you hurt anything if you have the ground clamps from seperate machines on the same workpiece when welding with the other machine. For example I have a Lincoln ac buzz box and a flux cored mig, if I have the grounds to both machines on the work and weld with one of them can i hurt the other machine. Sorry it's such a long post but it's a question that I have wondered about for a while.
exnailpounder
- exnailpounder
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Thats a good question. I have left my plasma ground and mig ground on the same fixture and never had anything happen but when I am not in a hurry I disconnect ground of the machine I am not using. I have wondered that myself.
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- Braehill
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Our old maintenance shop had a common ground for 6 welders and about 10 different tables so I wouldn't think this should be a problem. These were transformer based machines not inverters, I don't know enough about an inverter's circuitry to say if it's safe with them.
I use the building as my ground in the new shop all the time and have both the plasma and the old transformer welder hooked to it most days. The plasma cutter is inverter based, it's a Thermal Dynamics Cutmaster 52. Never gave it much thought though, maybe it's a bad idea. I'm anxious to hear from the gallery.
Len
I use the building as my ground in the new shop all the time and have both the plasma and the old transformer welder hooked to it most days. The plasma cutter is inverter based, it's a Thermal Dynamics Cutmaster 52. Never gave it much thought though, maybe it's a bad idea. I'm anxious to hear from the gallery.
Len
Now go melt something.
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Len
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Len
- ldbtx
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I can't see where it'd be a problem. It's just one side of the circuit, and it take two sides to make a complete circuit. One shop I worked in, we'd have two machines grounded to the same workpiece and two guys welding on it at the same time. No issues. These were, as in Len's case, transformer machines. My feeling is that it won't hurt inverter machines, but I'm not going to bet somebody else's machine on it. Sometime I'll try it with my inverter TIG and the Miller 252 here at work and report back.
Miller Bobcat 225
Tweco Fabricator 211i
AHP AlphaTIG 200x
Lincoln SP-135+
Hypertherm Powermax 30 Air
ProStar O/A torch
Tweco Fabricator 211i
AHP AlphaTIG 200x
Lincoln SP-135+
Hypertherm Powermax 30 Air
ProStar O/A torch
Think most grounds from a machine should be tied internally to your power ground so if you had a bad ground on the machine your using it could ground through the other machine cord. If it happened to be the light gauge ground cord of your plasma it could over heat that cord. It would take a whole series of what ifs but it could happen. I've personally seen chain falls get so hot you couldn't touch them because of a bad ground cable.
I have more questions than answers
Josh
Josh
A couple little tidbits on this one....
1. Electricity always seeks it's source. It needs to complete it's circuit otherwise it's only potential not current.
2. With welding you are simply completing an electrical circuit. A simple circuit goes from its source through its resistance and back to its source. So unless you hook two welders in series you only have basic circuits being completed.
3. Electricity flows from positive to negative by the path of least resistance. So in order for it to damage another machine the path of least resistance would need to be through the other machine which is highly unlikely. Not unheard of but you may have as good of a chance of lightning hitting the machine.
Any kind of suspect practice in welding can cause damage to people and machinery. Cross your I's and dot your T's and you'll b fine.
1. Electricity always seeks it's source. It needs to complete it's circuit otherwise it's only potential not current.
2. With welding you are simply completing an electrical circuit. A simple circuit goes from its source through its resistance and back to its source. So unless you hook two welders in series you only have basic circuits being completed.
3. Electricity flows from positive to negative by the path of least resistance. So in order for it to damage another machine the path of least resistance would need to be through the other machine which is highly unlikely. Not unheard of but you may have as good of a chance of lightning hitting the machine.
Any kind of suspect practice in welding can cause damage to people and machinery. Cross your I's and dot your T's and you'll b fine.
Be the monkey....
- ldbtx
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Just a little clarification here. Traditional electrical theory explains a circuit as if the current flows from positive to negative. However, the actual electron flow is from negative to positive.nickn372 wrote:A couple little tidbits on this one....
...
3. Electricity flows from positive to negative by the path of least resistance.
...
Miller Bobcat 225
Tweco Fabricator 211i
AHP AlphaTIG 200x
Lincoln SP-135+
Hypertherm Powermax 30 Air
ProStar O/A torch
Tweco Fabricator 211i
AHP AlphaTIG 200x
Lincoln SP-135+
Hypertherm Powermax 30 Air
ProStar O/A torch
- LtBadd
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Damn those pesky electrons!ldbtx wrote:Just a little clarification here. Traditional electrical theory explains a circuit as if the current flows from positive to negative. However, the actual electron flow is from negative to positive.nickn372 wrote:A couple little tidbits on this one....
...
3. Electricity flows from positive to negative by the path of least resistance.
...
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Richard
Website
Website
How fast is electricity? Slower than you might think...
In a direct current circuit, it takes an electron over an hour to pass thru a meter of wire.
In an alternating circuit, the electrons vibrate and will not actually pass thru the wire.
In a direct current circuit, it takes an electron over an hour to pass thru a meter of wire.
In an alternating circuit, the electrons vibrate and will not actually pass thru the wire.
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