Things You'll Need:
- Internet Access
- Welder Supply
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Step 1
Consider portability. If you don't need to move the device, you can consider a larger unit that stays inside the garage or shop. If you think you might need to travel with it, however, you might want to consider one of the smaller units that weigh under 100 pounds. Huge welders that run on a gasoline engine and are intended to stay in a truck or trailer are available, as are very compact units that can be carried easily.
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Step 2
Check size of units. If you plan on being a weekend hobby welder, then any of the nice 110-volt units should do just fine. However, if you think you might be doing jobs that require a lot of amperage, it might be wise to consider a larger, 220-volt welder that has advanced capabilities. Another thing to consider is whether you have access to a 220-volt outlet. If not, you may have to wire one in.
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Step 3
Select a location. If you are only going to be inside, then a MIG machine that uses gas will be just fine. However, for outside welding, wind can blow the protective gases off of the weld, and so using flux core or a stick welder is best. Again, the portability of the unit comes into play here for welding in different locations.
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Step 4
Weigh work options. If you plan on welding hobby projects or just fixing things around the house, then a lower-priced model may suit your needs just fine. However, if you are going to have paying customers or expect quality work, then the more expensive name brands are the way to go.
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Step 5
Check transportation costs. If so, then picking up the welder that you purchase shouldn't be a problem in most cases. If you are planning on ordering a machine from an Internet supplier, though, shipping price (based on weight and size of the welder) can become an issue. Be sure you know the total price including shipping before you buy.
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Step 6
Decide on materials. Aluminum is welded using a process called TIG, and TIG machines can get very pricey. Most MIG or wire feed welders can be converted to weld aluminum, but the spool guns and other hardware necessary for the conversion are not cheap. Aluminum cannot be welded with a stick or regular wire feed welder without the attachments.
