New TIG HF add-on unit and crystalline looking welds on stainless

[Maker]

What are your welds like without the HF add-on?

 

[tombardier]

I wouldn't be able to try without buying a different torch unfortunately.

 

[Freshfabrications]

Some mig sets connect the torch to the +ve side for dc welding, dc+ve arcs can be less stable, they also often cause the tungsten to make a massive ball and wibble about like crazy.

Have you noticed the tungsten going from pointed to a ball?? Just a thought, otherwise it could well be the sensitivity of the set not going below x amps?!

Jon