The Mig Welder is still the most popular choice of welding machine for the DIY welder and industrial fabrication shops. A Mig Welder is easy to set up, and once set simply requires the operator to master speed of torch travel.
A Mig Welder is capable of welding Mild Steel, Stainless Steel and Aluminium, although Mig Welding Aluminium should only be attempted by the experienced Mig Welder and results are limited.
The key advantages of a Mig Welder are high weld speed, ease of use and low cost. Disadvantages include less control over quality, fairly hard welds and possible mechanical problems if the machines mechanisms are not kept in good working order.