I have taught a couple of beginners in my garage. I usually recommend something like the Lincoln 90i because of less confusion. The beginners can get discouraged fast if they can not dial in a machine. The Lincoln keeps it straightforward. On the flip side, one of my students bought the ARCCAPTAIN and picked it up pretty quick. He loves that it can handle thicker steel when he is ready. If you want the least frustrating “plug and play” start, Lincoln. If you are okay with a slightly steeper learning curve but more capability then you can go for ARCCAPTAIN.
Feed is jerky cause of bad tension. Adjust roller pressure, my wire feeds smooth now. Check liner for clogs, Use 0.035-inch ER70S-6 wire, And clean with alcohol. Lube the liner too.
Grinding fan is likely bad bearings. Check motor for wear, And clean vents with compressed air. my fan quieted down after that. Lube bearings, And replace if it is bad.
Spotty welds comes from poor prep or settings, Clean steel with acetone before welding, My Esab Rebel had same issue, Use 120 amps for 1/8-inch steel, Set AC balance to 65%, Check tungsten sharpness, Use 25 CFH argon, Ensure clean joint fit-up.
Weak studs comes from bad surface prep or settings. clean aluminum with alcohol thorough, use 0.25mm pins for better grip, And adjust weld time to 0.3 seconds. check ground connection, and keep firm pin contact. this improves stud strength.
Warping is from too much heat. use 0.030-inch wire for precision, set voltage to 16V, And tack weld first to hold shape. check argon at 22 CFH, and cool with a damp cloth. this reduces distortion.
weak welds comes from low power or bad contact. Clean battery terminals with alcohol, use 0.2mm strips for strength, And set pulse to 6-8. check battery charge, and keep firm electrode pressure. this improves weld reliability.
Arc issues comes from bad contact, Check contact tip for wear, My Rebel 235 failed too, Clean tip with alcohol, set wire speed to 240 ipm, use 20 CFH argon, check voltage at 20V, and tighten connections.
