I have been doing a LOT of research into building my own 4'x4' plasma cutting table. I've just about worked out the mechanical side of things and the only question I cant seem to find a definitive answer to is... Can I use an HF pilot start inverter plasma unit ?

I have seen a lot of information that says I'll get a lot of interference from an HF unit.

I cant afford a very expensive unit such as a Hypertherm and have been looking at this unit from R-tech welding. http://www.r-techwelding.co.uk/weldi...r_R-Tech_P40HF

Would this unit be suitable if I make sure I use a local earth rod and use shielded cables to all steppers and home/limit switches etc?

I have lotts of questions but this is the main one thats bugging me at the moment,

Thanks,

Andy.