I have tried multiple times to go through this entire thread but keep getting interrupted. I think there is a good chance you are having some interference issues as you and others have surmised.
I am confident you can get up and running.
Follow the suggestions about cable management. You will need to uncoil your cables. I had fire control freeze on me a couple times. Got to where I was nervous to cut anything substantial for fear it would freeze up in the middle of a project. I chalked it up to the Primeweld cutter. I added 3 ferrite chokes. And I straightened all my cables… especially the work lead. Moved my cutter to the side opposite the control box and wired my vim box to the raw voltage lugs inside the machine. I also only run with my laptop on battery power. Since doing all of that I haven’t had any issues I also ran the cables on opposite sides of the mast.
I empathize with you. I know it can get frustrating. For me it’s just a hobby so that takes allot of stress and angst out of the equation.
These things are definitely NOT “plug and play.” I don’t think there is such a thing as plug and play CNC plasma. There are just to many variables to make that a possibility. There is a learning curve with all 4 components. CAD, CAM, setup and running the table and the plasma cutter.
We are here for you. Let’s get you through this.
Here is a thread that shows how to add the chokes.