Miller 3080 Bad Bevel Cuts, eats up consumables

[davisdrafting]

I’m having problems w/ a Miller 3080 plasma cutter,
It eats up consumables in about 3’ of cutting ¼” plate
The edges are extremely beveled 25*-30* typ.
It seems under powered when cutting?

The weird thing is it used to cut fine but always used tips up quickly.

Setup;

1. Miller 3080 set at 80A & 80psi.
2. Supply pressure 140psi w/ 3 water separators
& a Motorguard filter including the Miller filter.
3. I’ve varied my cut speed down to 1in min. and adjusted
the amperes.
4. Currently using a 80A extended tip with cut height of 0.07” also have tried two other ones w/ no good results.

[Fishy Jim]

Do you have a good ground contact?

Mill scale isn't a good conductor and should be ground off at the work clamp.

[davisdrafting]

Yes, new ground clamp too.

Found that drag tips last longer for some reason
and give a slightly better cut.