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General Mach Discussion / Re: Cambell designs THC -=- Table Ground ??
« on: March 20, 2008, 02:53:08 PM »
Depends which plasma power supply you are using. If it is a Hypertherm Powermax then you don't need the earth spike. Only plasma machines with HF start needs to clamp the RF to ground. But it is essential that you ground the table and machine to common ground. Reason.. If you have a short circuit to machine from the plasma neg it will seek an alternative ground and you can see some smoke on control wiring and PC, with collateral damage.
Whacko
Whacko
