Ignoramus30285 wrote:

I do not understand what DIG means... or why it is needed... thanks...

i

Is it one of the switch selections?

Two possibilities are that it is a setting to use when deep penetration
is wanted, such as butting two thick plates together, or that it is
meant to be used with a gouging torch for grooving out or removing
metal.

Just a wild assed guess though.

Cheers
Trevor Jones