Warm welcome needed...

Originally Posted by pedrobedro ...I see you went for the "low vibration" model, unlike your avatar

This was bigger so...

Originally Posted by scarecrow hi and welcome 1.2mm will be tricky to learn on if you could use of flat bar of steal as a heat-sink behind it copper or aluminum would-be even better and get the smallest rods you can 2mm or less and weld electronegative the jigsaw looks cool

I was looking for 1.6 mm rods today but surprisingly, couldn't find any so I am going for 2 mm. I'm going to try it without a heat-sink first, to see how badly I need one.

Also I don't think my inverter is capable of electronegative welding, there is no such information on the manual. I'm attaching a pair of photographs from it's manual, maybe it's there but they didn't mention it?

The high-lighted parts are the model I have.

your welder is a a dc Welder with a + and - on the two outputs to weld electronegative you just plug the electrode holder into the - (which is the negative)
to weld electropositive you just swap them around with the electrode holder in + and the earth in the -
electrode negative gives you less penetration which will help for lighter materials
electrode positive will give you more penetration

have a read through Malcolm ark welding library I would post you a link but my computer is acting up and won't copy and paste it should be on the top of the page in the ark welding Forum