Welder amps?

Question

I recently got a new welder, it’s a titanium unlimited 200 which for stick welding is rated for 200a but when I turn the knob it only goes to 170. It’s running on an extension cord that’s about 100ft but I checked the voltage at the welder end and it still says 240v. I know it should be able to do 200a cause all the charts on it with the recommended amps for each electrode go that high and some go to 210a and even the duty cycle is rated at 200a. What could be limiting it, is there something I’m doing wrong? I’m gonna be doing a build soon with some 5/32 7018 on some pretty heavy walled steel and could use the extra amps

Salty dog · Answer

When the welder is running the voltage will drop to zero and the amps will raise to max.

The core size of the supply cable could be too small. Is the cable becoming warm under load? If so, then replace it with a cable that has a larger core size E.G 2,5 cubic-square m/m per core or greater.
Welding unites have a core saturation time called -intermittent- as the coil warms up the coil resistance increases and the amps fall. Your welding unit could be too under dimensioned for the job in hand.

Aussie Devil · Answer

the voltage might say 240 volts but under load the current is dropping because of the long extension lead

y · Answer

More then likely the extension cord needs a larger wire size in order to allow the proper flow. Most extension cords tend to use the minimum sized wires they can get away with. Look, if possible at the gauge your extension cord uses and then find ones that can carry more.

Spock (rhp) · Answer

support page at the maker's website

Bill · Answer

Did  you  check  the  voltage  while the  welder  was  producing  the  maximum  amps?

Welder amps?

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