PLASMA NOISE IN THE KEYBOARD

After almost two months searching for my Plasma Cutter
Noise.
I had installed:
-An isolator transformer.
-An NEC/Tokin RFI/EMI line filter.
-I shielded all the limit switch cables trough a
tinned copper tubular wire braided.
Rewired all the grounds.

Look like it�s working.
I�m only getting noise that is crashing the PC by the
Keyboard.
I run the machine with it and the PC crash, I run it
without it and everything it�s OK.
Do you know a way to isolate the keyboard (it is
inside a metal cabinet)?
Or
Do you know how to get the control, space bar, tab and
F2 cables from the Keyboard to make a smaller isolated
keyboard?.
I thing those are all the keys Indexer LPT uses.
Or
How to install an external start switch(control and F2
keys), and how to wire it to the computer?


Best regards

Raul Lara


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