Valid Arc Lost 2

Just a long shot but I have a similar machine and the torches that come with the machine need at least 90 psi into machine and at least 55 psi flowing out of torch to keep blow back start working. ???

Changed the title since there is another longer topic with the same title and content.

kramerda wrote: Just a long shot but I have a similar machine and the torches that come with the machine need at least 90 psi into machine and at least 55 psi flowing out of torch to keep blow back start working. ???

hmm I would hope this isnt the issue because I just bought a new peerless compressor that pumps out 175 psi and when I disconnect the hose you can definitely tell there is a lot of pressure there. I might double check the plasma cutters own pressure gauge in the morning to see if i need to adjust.

snowgoer540 wrote: Would you mind posting your config here?.

ill grab it first thing in the morning

little_sparky wrote: I might double check the plasma cutters own pressure gauge in the morning to see if i need to adjust.

That has to be done while the air is on, while the torch is blowing air. Some plasma cutters have a switch just for that.
The pressure on smaller units has to be 5 to 5.5 Bar or 75 to 83 PSI, while bigger industrial ones need at least 7 bar or 105PSI. Anything below or above that might case miss fires and extinguished arc's .
Also when buying compressors for plasma, always check the volume per minute they can put out, it should be over 250 Liters a minute for small shops that do occasional work and at least 400 for all day work.
Another thing, noticed on youtube that in US they claim the volume for compressors at a very low PSI value, not at the max the compressor can do, and that is useless, and that trend started also here in Europe as i witnessed yesterday.
Last one i bought new was made in Italy and could do 420 Liters a minute at 11 Bar, so that was enough for two plasma cutters running all day long, but a 420L/m at 8 Bar can not keep two plasmas running all day.

Yeah, I was scratching my head over this a while ago until I realized I needed to turn up my regulator. As mentioned check the pressure during a cut. And check your plasma manual for the correct pressure.