clifford210
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does anybody know how much difference is acceptable if any
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clifford210
Member
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- 37
the artical i was reading descibed load volts as measured at the machine while welding arc volts measured at the nozzle while welding the artical is from miller found on google gas metal arc welding history of gmaw while i was looking for info on inductence and slope thanks for responding
clifford210
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dumb question i guess
SirDick Diodenob esquire
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I dont think it is a dumb question looking at post number 3 . There will be an on load voltage drop between the machine and tip where the arc voltage is measured , I dont know how much it will be but it depends on the impedance of the welding torch and earth connection , its not going to be much but with 30 V or less and currents of 200 amps or more there will be a drop probably less than 1Volt but still a drop . The rating and quality of the welding torch will partly determine what the voltage drop will be at full current but a high quality MB35 3M torch will obviously have a lower voltage drop than a low quality MB15 4M torch , I would be interested to know what the actual difference is and how it relates to how manufacturers rate their torches which they seem to do based on temperature and duty cycle but this to me looks open to abuse , would help if they also added the voltage drop when carrying say 200amps , I doubt on this basis that some of the far eastern made torches would come out very well ? To be more specific I would be wanting to see watts loss figure for the gun same as you get for fuses and circuit breakers .
