The DC / AC switching rate is 0.6Hz, and the DC is EN. Gas is pure Argon. I may have found the problem, or at least part if it. I have lengthened the post gas time to 15 seconds. I suspect the electrode runs very hot in AC/DC mode, and needs gas flowing for longer to let it cool. The electrodes stil...

I've been using mixed arc for welding Aluminum for a while, and weld wise all is good. I run 200 ish amps DC, 60% of the time, AC at 60% of that current. The AC is 250Hz, square wave, 62.5% EN. I am welding thin to thick, say 1" to 1/8", and get deep penetration and narrow welds. The probl...

Cheap grinder, juggled the disks and washers, works perfectly, the edge has enough diamonds to cut / notch the tungsten. I grind to shape using the (90 deg to the tungsten) rest, and finish with the tungsten held near vertical.

I had exactly the same problem, this video from Jody helped. http://youtu.be/LuRCoEshNto I was getting the horseshoe shaped puddle, now I get a oval one, and that has made a big difference. I'm actually using DC now, Mixed with AC half the time. The DC gets me a very narrow focused arc, and a short ...

I tried that today, welded two small bars together, heated until just blue then let it air cool. Quite tough, but did break at the same place, perhaps 1mm outside the weld.

I'll post some photos over the weekend.

I needed to tig a tube of silver steel to the same thickness (5mm) of gauge plate. Everything, and there wasn't much, said to use 312 filler rod, and keep the heat down. Did that and after two weeks of fairly hard use the gauge plate cracked 0.5mm from the weld. I'm guessing this happened at the edg...

Two other real "gotchas"

Quick Setup gets access to all sorts of useful things.

AC balance setting drives you nuts. The scale is from 50-75% negative, but shows as 0 to -50. So 0 is 50%, the default of -25 is 62.5%. Sigh.

The ground lead plugs into the left Dinse socket, labelled "-" You might find this forum useful; http://www.mig-welding.co.uk/forum/threads/mls-2300-ac-dc-mix-mode.56543/ There are quite a few 2300 users on that forum. At the end of the first post I've linked to some training material that...

http://www.hobartbrothers.com/product-d ... eg%3B+4943

I can see one rivet, but how was the tab welded / brazed to the header tank? Could be an awkward alloy, or copper plated?

My Gen III headgear off the Infinity arrived today. $29 and change from Amazon. Fits right onto the Elite helmet, and after only an hour today I like it. The only difference is the bigger "back of head" pad, but it does make a difference, to me anyway.
YMMV.

I removed the wheel from both ends of one of these, http://www.topmaq.co.nz/item/view/ALLWIN-75mm-Mini-Bench-Grinder---with-Flexible-Shaft?sku=MEGR4100 , removed the flexible shaft, and used the parts to lock a diamond blade on. Works brilliantly. The blades look like this http://gstraders.co.nz/pro...

I did have a Miller 9400 series, but found it heavy, caused neck strain. Swapped for a digital Elite.

Does anyone know if the Infinity headgear can be "spliced" onto a elite helmet?

These "weights" come in various sizes, 4lb seems about right. Cheap, but very hard to drill, 30 seconds with Tig torch on DC solves that.

Thanks, understood now.

4043 filler works better for me than 5653, 4043 dissolves into the base metal, 5653 sits on top. Never heard of this. Is this only for certain base metals? Last post down this thread. I have seen it elsewhere - but not as clearly stated. I now don't if it is true... :? http://weldingweb.com/showthr...

Jim, The link between the two parts is essential. I made a third hand, 6lb hammer head, drill and tap for 3 long 1/4 inch bolts, bend bolts, tip with bronze or copper. Jody uses one at times. I also tack the two parts. Try spacing the two parts slightly, perhaps 1/16". The weld then flows into ...

I had the same problem, and it's getting better, hopefully while there is still aluminium on the planet. I run 250 Hz, square wave with a sharp E3 tungsten. Balance around 62.5. At that balance the electrode stays sharp. I got some training as my welds were too big, turned out I was not using enough...

Press Quick Setup. What that does depends on where you are. Once in quick setup then the arrows change which parameter you are setting. The non manual is here, http://www.kemppi.com/inet/kemppi/kit.nsf/DocsPlWeb/om_mastertig_mls_2300_acdc_1910032_1112_en.pdf/$file/om_mastertig_mls_2300_acdc_1910032_...