Ahhhh, one of my favoritest subjects. /forums/images/graemlins/grin.gif
I have three and a half stick welders and two and a half migs. That's Miller Trailblazer 251, Miller Dialarc 250, Panasonic 260 Gunslinger, and an old Lincoln 130 suitcase that's been replaced by the Lincoln 170 suitcase.
The Panasonic is a two hundred and fifty amp mig with a 150 amp stick integrated into it.
I don't use the amperages some folks do. I've found that I run hotter than most folks yet from my perspective I've adjusted to running colder to allow the molten metal to have more time to get comfortable with it's surrounding.
I prefer stick. If given the choice nine times out of ten all other things being equal. I'll go stick.
First, stick gives you an opportunity to experience the intimacy of welding that's usually only experienced with TIG or oxy acetylene. Yesterday as I was sewing up pipe fence this thread came to mind.
The experienced weldor will understand what I'm talking about when I describe welding with terms like intimacy or sensuality.
When you're working with molten metal and it's all there in that state between falling to the floor or becoming one with the parent materials it all takes an appearance of and the immediatacy that comes from certain intimate moments. Enough said.
That special place in time and space is there in oxy acetylene and TIG. And it's also available when stick is done properly. I can imagine it can be found with MIG. Just not very often. With MIG I find it being more about getting it done than doing it. I'm a fan of the doing probably more than the done.
I really enjoy welding. For me it's just not about doing work most of the time. I cheat. I find myself trying to make each weld an event. That is a concious effort on my part. Each one would have a story if a job was a book. And most of the stories would be unique.
There are differences in the metalurgy in different areas of the same piece of steel. I am not a machine. My pace, arc length, and in general concentration varies. So in one weld there will be sections that will be like soaking in a hot tub, I'm there for the ride. But there will be moments of panic when I've changed the pace, there is a difference in metal thickness or the gap has changed. I have to change the pace, maybe even the pattern I'm using, to compensate. So for a couple of seconds during a weld I'll be coasting and during other seconds I'll be busier than the proverbial one legged cat on a hot tin roof discovering poop.
Another thing I like about welding is it's being a heckuva metaphor about how to live a life. You can do a weld concerned only about appearance and have a lousy weld. But generally speaking working a weld concerned only about doing a good weld will yield a weld that looks good. And as in life situations will decide the degreee of difficulty in doing it right and having it look good.
Along that thought we can compare how a mud or drag rod will do the row of dimes under perfect circumstances. While the same rod under difficulty, verticals for instance, not only make ugly welds but lousy ones. And the same rods that make a difficult weld a good one have to really work at making the row of dimes affect on flat work under perfect circumstances.
Like I said, welding's a great metaphor for life. /forums/images/graemlins/smirk.gif
The best weld and under some circumstances the fastest and easiest takes probably the most skill. It's called a forge weld. Blacksmiths do forge welding. What happens in a forge weld is the two pieces are brought to the almost molten state. The two pieces come together with each side being a little convex in shape. A light hammering is applied. This forces the two molten pieces to become one. Harder blows follow. This forces out impurities from the heat source, fluxes, and eliminates the opportunity for trash in the weldment.
There used to be a blacksmith that traveled around whupping butt on weldors. He'd challenge them to weld one inch by six inch plates together in a butt weld. Of course for the weldor there'd be the beveling of the edges, laying a pass, cleaning, laying a pass, cleaning etc.
For the blacksmith it would be putting the plates into the fire, hammering his bevel after they were hot. Reheating them and then hammering them together. A destructive test would always show his weld perfect because the forge weld is taking two pieces and making them into one.
Probably the biggest advantage of the forge weld is it has the least tendancy to create a weak area next to the weld. On thin materials you will notice it isn't the weld that gives away under stress. It's the fringe of the weld that didn't get hot enough to melt into the weld but so hot as to destroy the integrity of the parent material.
The other ways to weld involve melting part of the parent materials together while adding a filler material to compensate for the gap required for the heat source.
MIG is the weld that puts more emphasis on the filler than the melting of the parent materials together. It is the easiest weld to do. But it might also be the hardest to do right.
Sorry for the length of the rant. But it is your fault. You should have known I'd get carried away when the subject is so dear to my heart. /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif