PP 205 won't start an arc in HF, but will when scratch?

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Originally Posted by Jake98

No arc because it's delayed for the pre-flow, as it's supposed to, no?

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YOu are exactly correct.

You know what us lowly 200DX owners say, right? 'We don't need no steenkin pre-flow..' (knob)

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Originally Posted by posixPilot

Buggy,

I did pretty much the same thing with the plasma on my 256 ... the preflow was set way high, and I couldn't figure out why it wouldn't arc.

I haven't run the TIG function yet, since I do not have an Ar tank. I'm hoping that you ask a lot of good questions, so I don't have to ;) .

Cheers
Mike

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This snafu has actually been a blessing. It has made me understand the process of Tig a lot better. I now understand pre & post flow much better. The machine performs certain ways because it is how it's designed. My proposal is to just play with it and eventually you figure out the knobs. I am starting to understand the process.

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Originally Posted by Jake98

You know what us lowly 200DX owners say, right? 'We don't need no steenkin pre-flow..'

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I had a tig instructor over today and learned that post flow is essential to keeping the tungsten shielded and not having to grind every 10 minutes. Now my tungsten doesn't turn black!!:)

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Originally Posted by Jake98

You know what us lowly 200DX owners say, right? 'We don't need no steenkin pre-flow..' (knob)

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That's right, One less knob to be able to screw up.

That said, I think increasing the fixed preflow time a small anount would be an improvement on the 200DX. I tend to get a little better arc start if I start once off the part to purge, then hit it again to start.