I welcome everyone to the channel for self-taught welding and locksmiths.
When you start to master this necessary and interesting business on your own, then at first any little thing, any hint is important. Here's a simple but important piece of advice I'll give you today.
Polarity during welding, in simple words, is where we connect the wire with the holder - to the plus of the device or to the minus, it is clear that we connect the wire with a clip to the rest of the socket.
Here is the front panel of any inverter. Here are all the buttons and knobs to control the welding modes. Also terminals of the plus and minus connection of welding wires. The convenience and correctness of the welding process will depend on how we connect the holder wire and the ground wire.
Here we connect the holder with an electrode to the minus of the inverter. Remember, friends, this is a direct polarity. The minus is similar to the electrode, and the electrode is straight, so this will be the right polarity.
Connect the ground wire to the positive side of the inverter, respectively. I did not do this in the photo so that everything was clearer and better remembered.
Connect the holder with the electrode to the positive side of the inverter. This will be reverse polarity. Let's also come up with a hilarious analogy to make it easy to remember.
The way back home is always closer, so it's good, it's a plus. Or where it was good (plus) you always come back BACK. Plus on the electrode - reverse polarity, now we will remember forever. Why do we need to know all this? Look.
There are such electrodes, they are called basic coated electrodes. These are the UONI 13-55 brands, these are the most massive and affordable in terms of price and quality. There is LB-52U, they are better but much more expensive.
These electrodes are used to cook critical compounds without breaking. Basically, they are used to weld thicker metals. For home household welding, they are rarely bought, but still it will not be superfluous to have them. They need a polarity like this.
You already know what a connection is - reverse polarity. Also, for better memorization, I put the holder on the channel. Our channel is made of thick metal. Basic electrodes are only welded with reverse polarity.
Rutile electrodes are such brands
ano-21
mr-z
monolith
ok-46
They can cook in both direct and reverse polarity. Although on the pack, most brands recommend reverse polarity-plus on the grip.
These electrodes are bought by most for work at home or in the country. And they cook mainly a thin profile pipe. And with it, beginners have a problem with frequent burn-throughs. And to reduce this problem, you need to connect the holder like this.
For welding thin metals and shaped pipes, we connect the direct polarity-minus to the holder with the electrode. This is for rutile coated electrodes.
If you take a minute to reverse the polarity on the welding lead, your weld will be better. If you need a better penetration for a thicker metal, then only reverse polarity for all types of electrodes.
If you need to weld a profile pipe with thin walls, then initially we take rutile-coated electrodes and set straight polarity. This way there will be fewer burn-throughs.