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« Last post by M4wdFab on April 10, 2024, 06:12:04 PM »
so i have been learning some basic stuff i probably should have learned before jumping into this
tig torch cup size: number = hole size in 1/16" (ie #5 is 5/16", #8 is 8/16 or 1/2")
also: cup size X 2 is min recommended gas flow and cup size X 2.5 is max recommended gas flow in CU ft / hr of Argon
recommended tungsten stick out is also cup size in 1/16"
30% balance is recommended for oxidation cleaning portion of wave form (AC aluminum welding)
1 amp per 0.001" of material is standard
tungsten should be ground 30-35 degree point, and basically self balls / blunts. grind marks should be axially and not radially.
heat increases with arc length
120hz is most common starting point for AC aluminum. lower freq is wider/larger heat puddle (move faster) higher freq is tigher heat puddle (move move slower)
with aluminum the shielding gas is really just for the tungsten to keep clean. preflow of gas before arc like .5-1 seconds. post flow after arc like 10 seconds or until after tungsten is not orange will keep things clean. dont whip torch around crazy after arc end, keep still and let gas cool tungsten.
crazy amount of learning this week, its fun.
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