Modifying regular MMA welding machine into TIG and MIG ?

[Uralsk]

What kind of modification do i need to convert this regular MMA welding machine into TIG and MIG ?

 

[3DDave]

The simplest conversion is to buy a MIG or TIG welder, either new or used or repair one that has been discarded. If there was a cheaper way you would have found it using Google.

 

[TugboatEng]

No modification necessary. Any constant current power supply can be used to run scratch-start TIG.