Hi
We have a 160A Reboot Mig Welder. Its only a cheap jobby off amazon and was brought to replace a broken Sealy super mig 140 but welds suprisingly good.
However we have encountered a problem when welding to a steel stair case. The staircase is welded to the main steel structure of the building. The problem we are facing is when welding to it we are buring out the earth cable on the supply side of the welder. I have checked continuty between the work return clamp and the welders case and is open as it should be, however when the return clamp is clamped to the staircase there is now continuty between them, basically sharing the same ground. This is resulting in 160A passing through the earth cable that has been measured with a clamp multi meter.
Disconect the return clamp from the staircase and try to weld some steel steel that is not connected to the building and there is zero continiuty between the work return and earth and measure zero amapage through the supply earth and can weld as normal. The problem only exists when welding to the buildings steel that is sharing the same earth, presumable bypassing the work return clamp.
Any ideas on how to fix this problem?
We have a 160A Reboot Mig Welder. Its only a cheap jobby off amazon and was brought to replace a broken Sealy super mig 140 but welds suprisingly good.
However we have encountered a problem when welding to a steel stair case. The staircase is welded to the main steel structure of the building. The problem we are facing is when welding to it we are buring out the earth cable on the supply side of the welder. I have checked continuty between the work return clamp and the welders case and is open as it should be, however when the return clamp is clamped to the staircase there is now continuty between them, basically sharing the same ground. This is resulting in 160A passing through the earth cable that has been measured with a clamp multi meter.
Disconect the return clamp from the staircase and try to weld some steel steel that is not connected to the building and there is zero continiuty between the work return and earth and measure zero amapage through the supply earth and can weld as normal. The problem only exists when welding to the buildings steel that is sharing the same earth, presumable bypassing the work return clamp.
Any ideas on how to fix this problem?