i found a 100 amp mig welder,looks like a hf cheapo, for 50$.would this welder work for light tabs and other misc.i know it wont work for bumpers, but would it work for spare tire carrier and other stuff?
Yes, you will be able to do it. Heat at max. , speed around 3-4, and practice. Use slow whip motion, like making a "C" as you go. With less amps available, try to move forward a bit, back and up to make the "C", then sweep forward some more. You will see the blue on the steel, and better flow on the sides of your welds once you get the heat flowing in. If it is bubbled high in a lump, just slow down, and if the wire seems to push the gun up away from the weld, slow down the speed of the wire a little bit.yea its flux.thats cool, i figured 50 bucks,it will be something to play with and practise some fabbing,till i can buy a better welder.so you're saying it will weld 1.5 .120 mild tubing? because i want to build a spare tire carrier that will hold my hi-lift,ammo boxes & two spares.that i can remove when i want to use my bed.
If you can get it hot enough, yes. But the smaller machines like a drag or pull method better. The main thing is you have to weld a little slower to allow the heat to build in the puddle, and for real penetration. When you try it out a bit, you'll see what works best for your welder.so its better to push the puddle, versus pulling it?
Duty cycle is how much work the machine can do in an hour. Say, 100% duty cycle at 50% for your machine= one full hour at 50 amps. So, 25% duty cycle at 100 amps= 15 minutes of wide open welding in an hour. You'll never hit the duty cycle working on a bumper, so no worries!!!another thing is, what does duty cycle meen?i know its newbie,but i can't remember what it is.