I keep getting these weird looking type of burned lines around the edges of my weld. If I raise the trim it's more pronounced.. if I lower the trim it starts to go away to the detriment of the weld.
I'm welding in 5356 aluminum with 5356 weld wire.
This current setting is Ac prec pulse. 200wfs. 1.0+/- trim. 20 movement speed with circle weave.
Any idea what is causing this and how I can prevent it?
have you welded aluminum before in any way, robotically, MIG, TIG? or is this your first experience with it hands on?
copied from google: During welding, the heat of the welding process can cause aluminum to react with oxygen, nitrogen, and other gases in the atmosphere. This reaction can produce a variety of byproducts, including aluminum oxide and aluminum nitride, which can be deposited on the surface of the weld as a black, sooty residue.
We build aluminum docks, boat lifts and trailers at my work. all of our welds get cleaned. we brush all welds with a wire brush or brush wheel on a die grinder setup. we use pulse on pulse for most things in production and every welding robot uses the pulse on pulse process.
Lincoln MIG welders on the production line and Lincoln powerwaves for our robots.
And your shielding gas supply was okay?
