The machine will click on and off like a solenoid is kicking on and off. As long as the air is flowing, there is an arc. If the cup on the torch head is tightened down, it won't work at all. If I loosen the cup a couple turns, it will work sometimes. Sometimes it will work for a second and sometimes it will cut for 2 minutes.

I haven't opened the housing so I don't know what the inside looks like but it seems like a bad connection or sticking contacts.

Any help would be appreciated,

charlie