Problems with Miller Bobcat 250 220 Aux. power

I got a Miller Diversion 165 about a month ago and am having all sorts of p roblems getting a steady arc.
On DCEN, using a 1/16 electrode, around 50-60 Amps. Can get the arc to star
t, but it immediately dies out. I initially thought it was my bad technique and contamination on tungsten tip.
Brought it in to my welding shop, which happens to be an authorized Miller repair shop, and tried the 165 from their wall power. Worked perfectly, eve n with contaminated tip.
We concluded it is the power source; I am running off my Miller Bobcat 250, from the 220V Aux power socket. This setup required a power cord adapter ( $70 from Miller), and it appears to work on, as it lights up the 165, and I get the gas flow when I press the foot control. So there is 220 V across t he plug, but I am losing power after the intial arc.
I tried cycling the 50A breaker switch at the 220 plug without any affect.
Is there an internal breaker? Should I turn down amperage on the welder. An y suggestions? The Bobcat is 10 years old, but only has about 120 hours on it; I do not get to stick weld but once a month or so. Any help is apprecia ted.
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On Saturday, November 21, 2015 at 4:06:10 PM UTC-6, Bart K wrote:

problems getting a steady arc.

art, but it immediately dies out. I initially thought it was my bad techniq ue and contamination on tungsten tip.

r repair shop, and tried the 165 from their wall power. Worked perfectly, e ven with contaminated tip.

0, from the 220V Aux power socket. This setup required a power cord adapter ($70 from Miller), and it appears to work on, as it lights up the 165, and I get the gas flow when I press the foot control. So there is 220 V across the plug, but I am losing power after the intial arc.

.
Any suggestions? The Bobcat is 10 years old, but only has about 120 hours o n it; I do not get to stick weld but once a month or so. Any help is apprec iated.
I feel stupid. I assumed the welding power and axu power were entirely sepa rate. I had the fine control of the welding power all the way off; all I ha d to do was turn it to 100% and I get full power to the Tig welder.
The Diversion 165 is such a smooth machine; got some nice looking beads on stainless with very little practice. No welding fumes and no slag to clean off!
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