Fire, hot metal, and shop rules we all follow
Alright. So this is the last one in this module before we actually get our hands on the machine for real, and I want to use it to pull everything together into rules. Not suggestions. Rules.
I feel like when people hear "shop rules" they picture some laminated poster with clip art on it. This isn't that. This is just the stuff that keeps you from getting hurt or burning something down, and every single one of these came from somebody learning it the hard way, usually me.
Rule one: know where your fire extinguisher is before you need it
Not "I think it's around here somewhere." You should be able to point to it with your eyes closed. MIG welding throws sparks, and those sparks don't care where they land. They'll roll off the table, drop into a trash can, land in sawdust, whatever's nearby. Most of the time nothing happens. Every so often something does, and that's the time you want the extinguisher to not be a mystery.
If you're setting up at home, put it on the wall near your welding area, not buried in a closet. Takes five minutes.
Rule two: clear your space of anything that burns
Sweep the floor. Move the cardboard boxes. Get rid of any rags with oil or solvent on them, those are sneaky because they can smolder without you noticing. I like a concrete floor if you've got one. Garage floors work fine. Just look around before you strike an arc and ask yourself what's within about ten feet that could catch, and then deal with it.
Rule three: check your ground clamp every single time
I've told you before I'm no pro, and this is exactly the kind of thing a pro would've caught faster than I did. First real project I tried after I'd been practicing a while, I set up, laid my metal out, went to run a bead, and nothing worked right. Wire was feeding, gas was flowing, settings looked fine on paper. I spent a solid ten minutes going back through everything, gas, wire speed, voltage, convinced I'd broken the machine somehow.
It was the ground clamp. It had fallen off the table onto the floor when I bumped it setting up, and I hadn't noticed. No good ground, no good circuit, no good weld. Now it's the very first thing I check when anything seems off. Clamp's on, clamp's got good metal contact, no rust or paint in the way. Takes two seconds and saves you a headache.
Rule four: know what's hot and treat everything like it's hot
This sounds obvious until you're standing there twenty minutes after you finished welding and you go to move your piece with a bare hand because it looks cool. Metal doesn't look hot. That's the whole problem with it. Steel can sit there looking exactly like it did before you touched an arc to it and still be well over 500 degrees.
Use pliers. Use gloves. If you're not sure, assume yes, and let it sit longer than you think it needs to. I usually just leave stuff on the table and go do something else for fifteen, twenty minutes before I touch it with anything but pliers.
Rule five: ventilation, still, always
I'm not going to redo the whole lecture from last time, but it belongs on this list because it's a shop rule same as the rest. Fan on, door or window open, welder positioned so fumes aren't drifting into your face. Jan moved my welder out of the garage bay and into a better-ventilated corner after I came inside smelling like burnt metal three days running, and she was right to make me do it. This isn't optional and it's not something you get casual about once you've been doing it a while. If anything it's the opposite, the more comfortable you get, the more likely you are to skip it, so watch yourself on that.
Rule six: nobody welds alone in the house, at least at first
I feel like this one gets skipped because it seems overly cautious, but when you're starting out, have somebody else around. Not hovering over you, just in the house, aware you're out there. If your ground clamp falls off, or your gloves catch a spark, or you just need help lifting something hot, it helps to not be totally on your own.
A simple pre-weld walkthrough
Before you strike an arc, every time, run through this in your head:
- Extinguisher located
- Floor cleared of anything flammable
- Ground clamp attached and making good contact
- Ventilation running
- Gloves and helmet on
- Somebody else aware you're welding
That's it. Thirty seconds, and it becomes automatic pretty quick. I still run through it every time I fire up the welder in my garage, and I've been doing this a while now.
Before next time
Set up your own version of that pre-weld checklist wherever you're going to practice, extinguisher, clear floor, ground clamp, all of it, so next time we meet you're ready to actually run a bead instead of scrambling to get safe first.