375 plasma

[gilo1968]

i bought a 375 plasma, hooked it up to cut. I used on 14 gauge purlins cut well. then i tried on used 1/4" plate for practice and would not cut at all. It would start then it would turn off at several attempts. I am using nitrogen at 90#, machine @ 60#, amp setting 24-27 and nothing. ANY POINTERS

[Desertrider33]

When mine acts like that, it's because it doesn't have enough air. Have to let the compressor run some more and catch up. That only happens with the compressor in the shop. The compressor on the truck is much more powerful and the plasma never starves for air with that one. I've never ran mine from a compressed gas bottle so have no idea what the problem may be, provided the bottle is not near empty.

[tom37]

My 375 e-treame does this when I have a poor ground at the clamp or I am starting a cut on a painted surface. I notice this more on thin stuff like 55 gal barrels. My thought was that the ground clamp doesn't rest totally flat on the thin stuff. I'm not sure if this will help ya but it may be a place to start. I haven't had any troubles with low air except when I forget to turn the compressor on, and even then it runs fine until the air drops really low. I do have to cycle the power switch after I get the air pressure light turned on.

Good luck

[cruizer]

Make sure that the air pressure is spec'd with the torch depressed or with the air set on and air flowing to read 60psi. Naturally if you set the air pressure gage on a non flowing state, it'll drop when flowing and you won't get much of a cut out of it.

[gilo1968]

thanks for the reply will try on my days off.

[gilo1968]

When mine acts like that, it's because it doesn't have enough air. Have to let the compressor run some more and catch up. That only happens with the compressor in the shop. The compressor on the truck is much more powerful and the plasma never starves for air with that one. I've never ran mine from a compressed gas bottle so have no idea what the problem may be, provided the bottle is not near empty.

I do have the bottle regulated @90# i'll bump it a bit and try it again. Does it matter if metal is new or rusted a bit ( no scale of rust)

[gilo1968]

Make sure that the air pressure is spec'd with the torch depressed or with the air set on and air flowing to read 60psi. Naturally if you set the air pressure gage on a non flowing state, it'll drop when flowing and you won't get much of a cut out of it.

thanks for replying will try it again