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Yes, it sounds like Acetone or Lacquer thinner have similar nasty properties, so I guess I should use Acetone simply because it leaves no residue, and flashes off quickly. But lighting an arc too soon after using either one sounds like a good way to start a fire, since the vapors are flammable...

You raise a good point about the oxidization on the aluminum table being a potential issue. I suppose I could try doing the following: 1. I could brush both top and bottom surfaces of the corner where I have the grounding clamp to remove any oxidation, and then clamp the ground clamp back on...

I know that neither Acetone or Lacquer thinner is great for human inhalaiton, but Is Acetone no less safe to use than lacquer thinner? Jim G

I will try moving the ground to the workpiece. What I don't like about doing that is that the workpiece will no longer be flat on the welding table, so more prone to warping during welding. This is because during my self-training, I am doing dry arc dabs, dry arcs, dry arcs with stepping, and...

Ah, that makes sense. I'll try that.

This is in AC mode, welding Aluminum, at 120 hz, 1 second preflow, 30% balance, no pulse, and current set amperage does not seem to make a difference. Dusty at Pacific Arc TIG Welding (My instructor on the video training course I am taking) has replied to my direct question to him and said...

My Canaweld DC-AC TIG 201 Pulse D welder setup came from Canaweld with quick release fittings for the Argon gas line. Seems to work fine.

My son bought me a Canaweld AC-DC TIG 201 Pulse D welder kit (machien plus most items needed to get started in TIG welding), as a birthday present for my 72nd birthday! I ahve never welded before in my life, so am in the process of learning TIG welding via a video course from Pacific Arc TIG...

My son bought me this model Canaweld AC-DC TIG 201 Pulse D welder as a birthday present (72nd birthday!), and I learning to use it for aluminum TIG welding via a video TIG training course by Pacific Arc TIG Welding! I have never welded before. The machine and its "kit" seem to be working great...