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Hi Robert, Flux cored will look like 7018 if properly applied. Welding with flux cored, it does take some getting used to a different looking weld puddle. The flux boils (for lack of a better term) out to the top of the weld puddle giving a apperence that the weld puddle is proper width when actually it's not. I find that looking at the back of the weld puddle is more accurate in judging when it's time to move. The length of tip to base metal must also be kept at a proper "continuous" distance, 1/8" to 1/4". Most welders have to tendancy to vary the distance as there welding. Make sure your wire speed is correct for the amount of amps and should sound like bacon frying. When having problems most welders will do better at higher amps as the flow will seam easier. If you would give some more details of what exactly is wrong it will help solving your problems. Are you welding indoors/outdoors, metal thickness, wire diameter, tip size, cup size and length to end of tip, did you clean the base metal 1" on either side of weld joint, weld bead narrow/wide, pot holes in the weld face, undercutting, toe of weld not straight, joint design? I know it's asking a bunch, but it will help to tell what to suggest. T_Bone
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