250i help

[g8trwood]

i have a new 250i and I am trying to cut some 1/4 plate, I had all kinds of fits, tons of slag and it took me forever to complete the cuts, I am in need of assistance. Can someone recommend what my amps and air pressure should be? I was ready to get a sledge hammer our earlier today...

[Gadget]

I would use about 40 amps and 55 -65PSI. I've had that problem myself before and am embarrassed to admit I forgot to connect the ground lead. It was cutting using only the pilot wire to complete the circuit.

[arandall]

I would use about 40 amps and 55 -65PSI. I've had that problem myself before and am embarrassed to admit I forgot to connect the ground lead. It was cutting using only the pilot wire to complete the circuit.

Glad you ponied up first Gadget - I've done the same thing.

[Gadget]

Great minds think alike Art, or maybe it's fail to think.

[g8trwood]

Not the ground this time, new plate and I even sanded a spot clean for the clamp. I had my air pressure up around 80, so I will cut it back some. I do have plenty of air that runs through two driers before getting to the machine.

[Gadget]

80PSI seems a bit much for quarter inch plate.

[SICFabrications]

also check to be sure that you have the leads hooked up on the right studs as well.... you cant run the plasma off the positive side of the machine

[KHK]

Just a few questions. What type of metal are you cutting? If you fire the torch in mid-air what happens? When fireing the torch in the air, can you feel the torch move from the air pressure. Does your machine have a ARC Force knob? If so try setting it above 50% of the dial. ALL of the previous posts cover almost everything else.
Let us know what happens.

[g8trwood]

So are you saying the leads would be opposite of stick welding? Meaning the torch is hooked to the ground side? My pilot arc is working normally if that helps

[SICFabrications]

yes, for plasma, the torch will be hooked up on the negative side of the machine same with tig...