255EXT Aluminum Tig Pulse Settiing Comparison/Suggestion
Figured I'd start a thread showing my results with settings to get & give input as I have noticed that exact settings with experimentation and results with photos are somewhat lacking. I recently upgraded from my Lincoln Tig200 to a long awaited 255EXT as the Lincoln was limited in it's ability to adjust parameters especially pertaining to the pulse parameters.
All of the welds have been done on a positioner with a stationary torch holder (manual) as I'm trying to dial in settings while minimizing the human element as I'm not that good with holding the torch due to a hand injury. I have notice that even the slightest adjustment in torch position has a dramatic effect on the weld bead. Positioner speed set just slightly below 1/8" per/second, material is 3/16 6061 aluminum tube. A/C balance set to 20 for all welds, 1/8" 2% Lanthenated sharpened to a point.
From left to Right:
1. 205AMPS/34% time on/15%BG (Background) amps .8PPS/250 Hertz
2. 205AMPS/36% time on/20%BG amps/1PPS/250 Hertz
3. 205APS/36% time on/20%BG amps/.5PPS/200 Hertz
4. 155AMPS/40% time on/10%BG amps/1.5PPS/200Hertz (This one was slow very slow to start and was difficult to keep the puddle out ahead)
5. 175APMS/50% time on/10&BG amps/.5PPS/200 Hertz
6. 175AMPS/50% time on/BG amp all the way down/.3PPS/200 Hertz
My goal was to find the best setting without wicking over the edge and to evaluate the bead appearance.(Oh how we all love a stack of dimes)
Please comment with your opinions and suggestions and we'll see where this thread goes.
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