MIG WELDER CHECKLIST

1

A basic safety check of the machine should include inspecting all power leads for integrity and replacing any sections of exposed wire, or damaged insulation. Pictured is the negative polarity lead.

2

Correct wire tension should ensure an even feed. Too little tension will cause the wire to skid on the rollers; if overtensioned, the wire could bunch-up just in front of the wire spool.

3

Most torches are of a universal ‘Euro’ type. Older welders may have their torches hard-wired to the machine, for which replacement parts might be unavailable. Euro torch conversion kits may be available, though.

4

The wire is fed via a steel liner that runs through the lead and into the torch. Wear, or deposits, can build-up within the liner and affect the wire flow, which leads to difficult operation, erratic wire feed and weak, defective welds.

5

Pictured is one of the diffusers, through which the shielding gas flows under pressure from the cylinder. You need to ensure that welding spatter doesn’t impede the gas flow, which is vital for good gas shielding and a successful weld.

6

The tip passes over the wire and features an M6 thread that screws into the torch body. The diameter of the tip hole varies according to that of the wire; this one is 0.8mm. Always carry spares.