A welding machine is a basic tool in every workshop and garage. It is important to buy a machine that will serve your need well. Welding machines supposed to serve your professional and also personal needs.
When choosing welding equipment, you need to know how you are going to use them. You should always buy machines and tools that are specific to your needs. The first thing is to understand how the welding process works.
Power
The power that you need will determine the welding equipment that you buy. If you are a beginner and you are welding as a hobby, then even 120 voltages are enough for the equipment. On the other hand, if you operate a commercial garage where you do all types of welding projects, then you might be required to look for a high voltage machine.
With a high voltage machine, you can weld very heavy metals for commercial purposes. It is also possible to use a heavy saw for your machinery. Power is everything and especially when it comes to welding equipment.
Material
Welding is all about joining pieces of metal together using a welding machine. It is important to determine the type of metals that you will be welding. There is specific equipment for welding cast iron, aluminum, copper and other materials.
Choose a welding machine that will help you in welding the materials that you will be using in your workshop. A welding machine specifically made for joining cast iron might not work well for welding cast iron.
Level of expertise
The level of expertise will determine the welding equipment 
that you buy. If you are a beginner, then you need simple equipment for welding. On the other hand, when welding complex projects, then you might need a machine and equipment that will allow you to do it in the right manner. The last thing that you want is to buy a machine that will be to difficult to use or one that will not serve your needs well.
Portability
Portability is something that you should never ignore when buying a welding machine. If you are always working on your workshop or garage, then portability might not be an issue for the welding. On the other hand, if you go from one place to another working for clients, then you need to look for a welding machine that will be easy to carry.