Re: PLASMA NOISE IN THE KEYBOARD

Raul,

You might want to try a different keyboard. The keyboard contains a
seperate 8-bit microprocessor (used to be an 8048, don't know what it
is now) which may be reseting or goofing up because of the noise.
Plasma is nasty stuff electrically, you may find a different keyboard
may be more immune.

Mariss

--- In CAD_CAM_EDM_DRO@y..., Raul Lara <ralaco@y...> wrote:
> 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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