I have a YesWelder Tig 205DS that does stick and Tig. I wanted TIG to weld billets (damascus, san mai and mokume) without a filler rod for forge welding w/o flux. I also wanted to be able to do basic shop fabrication like welding work sticks, making up fixtures/jigs, etc. These were both equal priority for me. I figured the stick would let me do that w/o gas (simple, less cost of gas cylinders) and I could get a gas cylinder of Argon when I was ready for Tig. I saw stick was the simplest and easiest to learn, so I ignored Mig. I got the welder for under $200 (amazon coupon!), then added in a cart, welding table, welding helmet, gloves, gas cylinder, good regulator, electrodes, filler rod, etc, etc etc. I didn't go to the Mig/Stick/Tig welder because I figured the stick would get me the basic fabrication and the Tig would do with or without filler rod. The welder was a small amount of money compared to the other stuff I ended up with!
I got the welder, hooked it up 110V and tried it out after watching lots of YT videos. 7018 rods (they seemed to work well in the YT videos I saw and had a weld coating that was easy to break off and the welds looked nicer with less cleanup and less worry about moving your hand back and forth to get a nice weld) stuck horribly unless I cranked the amps up and tripped the breakers. I tried 2 different brands of rods and had difficulty with both. Welds looked OK when I got it to start, but super frustrating to try to use with the sticking issue (and the amps seeming to be lower to what is shown on the machine!) until I went to 240V! Took it over to show my buddy who was helping me build a forge since he has welding experience. He had the same issues sticking rods on 110v, but is familiar with Mig and TIG, but not stick welding. I tried his HF MIG welder and was getting good beads after a few minutes of practice and wished I got the Mig/Tig/Stick machine instead! He was using the gas Mig setup and had it pretty much dialed in (gas pressure, wire feed speed, etc), which is a big piece of the puzzle! Mig was nice because you don't have to move your hand closer to the workpiece as the stick rod burns down and your filler rod comes out on it's own, so there isn't a hard learning curve to feed a rod with an off hand or start with your hand high and bring it down to the work piece as you move it. Wish I got the Mig/Tig/Stick welder so I could use flux core for the Mig for basic welding and the Tig for other stuff. If I had tried his Mig setup before getting my welder, I would have gone with the other machine!
I tried the welder on a 240V after getting an adapter cord and checking with my electrician. We had wired a 240v outlet (3 prong dryer outlet) and had wired the ground into it, so I could use the adapter plug and still be grounded properly. 240V made a big difference with stick as did trying other electrode rods like 6011 and 6013. More splatter, but better penetration and less sticking of the electrode. So 240V made a HUGE difference for me as a newbie! The multi voltage is nice as was discussed above, but run on 240V if you can, but practice with 110V so you know how it works as well! Also, the amps on my welder seem to be lower than what it shows, so I am learning what amps for different thickness of steel and what rods, so there is a good bit of learning curve. I usually work 1/8" to 1/4" steel, so I am trying to learn the settings for those. I did some thicker stuff with electrodes like when I welded a 1/2" thick piece of plate to a 3# sledge to make a flatter (pre heated the head to soften it and let it sit on the plate to let the plate pre heat a bit) and when I made a tilting setup for my 2x72 with 1/4" plate, 1/4" tubing and 5/16" angle. I gotta redo it because I got the 1/4" plate too hot and it warped a bit. I need to learn to do some tack welds first, let cool, and then fill in smaller sections and not try to weld a 4 to 5" long section in one go! Gets too hot and then warps. Gotta redo it sooner than later so it functions better! When using stick, most of the time I don't bother to clean the weld splatter off other than wire brushing it when I am done.
With the Tig, I ran it OK on 110V with and without filler rod. I went to 240v and it went better, more consistent welds. Then I tried a stubby glass lens kit and the welds looked worse? I guess you have to adjust the gas pressure with the stubby lens kit? I went back to the ceramic cups for now and gotta find someone locally who can come by and help show me some of the stuff! My electrode is always getting covered in soot, even if I don't dip it into the weld and with running between 15-20 psi of 100% argon, so I gotta figure that out as well. There is no pre/post flow adjustment on my welder; it's at around 3- 4 seconds of post flow IIRC? The welder has a on/off foot pedal or a button on the torch for on/off, so I can't control the amps with a foot pedal. When welding up a stack of 20 quarters for mokume, I am running around 130 amps and it takes a few to several seconds to get a good puddle to push across for the first bead. The next beads go better since the stack is hot, but it's almost at welding heat when I am done with the 3rd bead! It would be nice to be able to start high and then back off with the foot pedal as the piece heats up instead of having to try to fiddle with the dial as I go. It gets very melty quick when the piece heats up! I like Tig, but there is a lot to learn!! If you want to do Tig, get a good Tig machine with the settings so you can dial it in better. If you have no interest in Tig, get a machine that will do what you want it to do and don't pay the extra for something you won't use and wish you got a better machine with settings that you will want! I learned the hard way that a cheap welder may not have settings you will want down the road and won't be as versatile as you though. Or you find more stuff you want to do with it and realize that you don't have the ability to change the settings to make it work better!
There is a lot to learn with welding. I am glad you found a local class! I wish I had taken a few classes! I need to find someone who can show me the ins and outs of the different welding methods and my equipment. Don't just have them set it up for you because you won't learn the why and how!! I don't have any desire/plans to weld aluminum, so I didn't bother looking at anything for aluminum. I wish I had gone with the Mig/Tig/Stick combo since the Mig would have been easier to use flux core for basic welding and Tig for welding up w/o a filler rod. Try out different machines if possible and see what all of those other settings do for you! Some guys love stick because no gas needed, it's simpler and easier to learn. I did better with Mig than with Stick though? I watched a lot of YT videos and reviews before going with the YesWelder, but most are from experienced guys who know what they are doing and can make the machine run well with it's limitations. For a newbie, I had a lot of questions and need to find someone locally who can give me some basics in person with my machine/setup.
Good point above on the helmet. Mine has a ton of settings and I need to learn how to adjust it better. I was welding in the evening when it was getting darker when I was first learning, but if I weld during the day, I need to adjust the helmet so I can see what I am welding better. It seems like my helmet is too dark at some times and I can see the puddle, but little around it. Tig vs Stick is different brightness, too!