Nothing starts, I let go the trigger and try again. As I said when cold I pull the trigger and a small sparking takes place for just a second. Not understanding what goes on I express it as I see it. So what I would advise is to methodically and thoroughly inspect the machine from nose to tail for physical problems first. In general in this type of construction components shorting to other components is always a danger. Or the toroids can move and short to other components. It is a common fault for the mounting glue to fail and the self leads to fracture. In this case the obvious contenders are the controller board and the row of Insulated Gate Bipolar Transistors (IGBTs), assuming that's what they are.īut often it is simple things that cause a fault, like a loose connection, a corroded connector pin or solder joint or broken wire or cracked Printed Circuit Board (PCB).Īlthough your plasma cutter is probably well designed from the electronic point of view, some of the mechanics look a bit suspect, especially the mounting of the toridal inductors. With any system it is always a temptation to blame the most complex and expensive part for a fault, but often this is a misnomer. Without a schematic, and knowing a bit more about the symptoms, it would be difficult to diagnose the fault but here are a few words: I am amazed how clean your plasma cutter is inside. Wow, that is quite a machine: great pictures too. Where are you: care to put it next to 'Location' on your user page so that it shows in the window on the left of your posts.

Cut 40 plasma cutter circuit diagram