Welcome to the site, come on.... don't be shy..tell us what you bought..we promise not to take the mickey.
Regarding the arc set, short bursts of weld are common on a lot of the cheapies before overheating, has it got a cooling fan (turbo), if not then adding one to blow through the machines vents can make a lot of difference.
cheersi bought a supermig 150/5 secondhand are they any good? about the arc welder it doesnt have a turbo,would a normal household fan work very well,cheers for the welcome
Anything that can push a bit of fresh air through it will always help to extend the welding times.
Depends on your elecrical knowledge, some people use a normal household fan, others use a big PC case fan and run it off a cheap power convertor at 12volts.
Not had any experience of the supermigs, a lot of people have them so I should imagine if serviced with good liner and tips etc it will do you spot on.