At the Miller site under "TIG Tips" they give the following advice:
"Keep the torch cable from contacting any grounded metal."
Why oh why? They say this under the heading "What can I do to improve arc starting?". First I've heard of this, and I thought I was well read.
--zeb
my guess is that high frequency high voltage starting current needs to go through the electrode, not through torch cabe insulation to metal.
i
And it becomes more important as the arc points, that act as a voltage regulator(clamp), pit and provide higher and higher voltage.
Martin
Mart> On 12 Nov 2006 06:20:53 -0800, snipped-for-privacy@hotmail.com wrote: >
Note that the HF doesn't need to punch thru the insulation. It can also capacitively couple to ground because it is of radio frequency. (That's why they call it HF)
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