Long time lurker - First time poster.
Hi,
Since it's my first post, here's an introduction:
I'm the sole fabricator for a small engineering firm in NH. It's mixed media so I work with everything from metal to carbon fiber to polyethylene to wood to who knows what. I do machining, assembly, electronics, soldering, brazing and of course welding. While I'm not a full time welder, it's becoming more important.
On the metal joining front, I've done OA welding and brazing, wire feed, stick and tig, stud (and screw and glue).
The issue that brings me out of the lurking shadows is my xmt 304 cc/cv.
It was working fine, then one day when I turned it on, the stick mode was not working - small sparks and no way it was going to hold an arc. Turned up the amp control and at around 145 it jumped to 999 and stays there even it the amp control is adjusted. If turn the amp control all the way down it sometimes goes to zero and it will allow me to turn the amps up until 145 or so and then it jumps again to 999. Even though the amp display changes, this has no effect on the amount of arc.
For giggles, I tried it in tig mode with argon. The readings on the display act as they should there, but only small sparks again and no arc. It has enough to stick the electrode if I try and that's about it. The lift arc is also not working. It acts just like the scratch start.
For a little more info, here are the readings when I go through some of the modes with the machine set to "panel" and 0 arc control:
Mode; V ; A
V sense; 87.4; 999
Stick; 87.7; 0-145 then jumps to 999
Pulsed Mig; PP.P; PPP
Tig; _._; 0-400
Liftarc Tig; 7.0; 0-400
The plug is set up for single phase with the red wire insulated, taped back to the outside of the power cord and not connected.
Any help would be much appreciated.
Thanks.
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