Welding Tips and Tricks

I was just thinking and wondered if it was possible to stick weld at 700 amps on a dynasty 700 and if so what for and with what electrode. Even running 350-400 aps on a dynasty 350/400 seems excessive but I dont know maybe somebody stick welds some 5¨ weldments with 1/2" stick electrodes.

1/4" electrodes get up in the 400 amp range.

For me, buying a large output machine is to ensure that the duty cycle in the midrange is very high.

For example, my tig has 60% duty cycle at 300 amps and 100% cycle 250 amps. I can tig aluminum as long as a want

If I bought a 250 amp tig, the duty cycle at 250 amps would be too low for my patience level.

A 200 amp machine would not be fun for me, even on steel I like to tig 180-190 amps pretty often.

Similar to what Dave said, the machine has to meet or exceed any expectations for its use. In a large fab shop I was in there wasn't a machine in the place that was less than 400A @ 100% duty cycle, and most were Dynasty 600's. On large weldments using 1/2 inch plate and above, deposition rate becomes really important, and with heavier flux cores you can be running at 400+ amps all of the time. Or, when called for, break out a sub-arc machine and really put it down.

One large sub-arc gantry system in the place had a 4 spool system- 1- 1/6th flux core root, 1- DC 5/35 hardwire, and 2- AC 5/32 hard wire. It was a monster and would seam 2 half inch plates together (with 3/8 backer) for 17 feet with a 5/16th gap in about 10 minutes. Once you get into high deposition sub arc the currents go way up.

Farmwelding wrote:I was just thinking and wondered if it was possible to stick weld at 700 amps on a dynasty 700 and if so what for and with what electrode. Even running 350-400 aps on a dynasty 350/400 seems excessive but I dont know maybe somebody stick welds some 5¨ weldments with 1/2" stick electrodes.

I had dinner this evening with a buddy who is doing some contract work on a bridge in the DC area. He's running 3/8" rods welding 2" thick plate steel to 4" thick I beams. He's pouring the heat to it with well over 400 amps. And its all X-ray work. Not something I'd want to do, nor capable of, but I guess there's an application for nearly every configuration.

i burn jet rods on some load out jobs cant tell you what diameter they are because i never checkedbut they are 1/4 or close to iti normally run them in the 350+ amps range.i sure would like to see a monster rod that burns at 700 amps that would be a beast. probably get some 1/2 round bar and dip it in flux.lol.

Farmwelding wrote:I was just thinking and wondered if it was possible to stick weld at 700 amps on a dynasty 700 and if so what for and with what electrode. Even running 350-400 aps on a dynasty 350/400 seems excessive but I dont know maybe somebody stick welds some 5¨ weldments with 1/2" stick electrodes.

probaly something like a 3/8 rods in XX18 or XXX18 or XX24 1/2 rods start around 800A

now 3/4 rods might be fun to weld with at 1200-2100A lol

ryanjames170 wrote:

Farmwelding wrote:I was just thinking and wondered if it was possible to stick weld at 700 amps on a dynasty 700 and if so what for and with what electrode. Even running 350-400 aps on a dynasty 350/400 seems excessive but I dont know maybe somebody stick welds some 5¨ weldments with 1/2" stick electrodes.

probaly something like a 3/8 rods in XX18 or XXX18 or XX24 1/2 rods start around 800A

now 3/4 rods might be fun to weld with at 1200-2100A lol

What do you use to get 2100 amps let alone 1200

2 or 3 machines togeather to run one rod.

Poland308 wrote:2 or 3 machines togeather to run one rod.

What you can do that? Do you just crank three engine drives up and then tie the cables together is that my redneck mind making it super sketchy?

D.C. Voltage it's not scetchy. Yes they hook multiple togeather. Research see if they tie them parallel or series.

Gotta be in parallel. Series would raise the voltage with the same current.
Parallel would be same voltage and added current.

Here's something about that. I've never done it, but there it is.


https://www.millerwelds.com/-/media/mil ... leling.pdf