Hiya...and thank you for your time over this. The spikes you talk about I thought would be taken care of by the very large mains filter I've fitted recently but I must say it hasn't helped at all....just glad I didn't pay the £185 price tag on it!!!

I agree that the drives must be very sensistive and I am considering different drives but not sure which ones...they are not cheap and I can't afford to waste money.

When you say additional caps on power inputs to the drives...the only caps I have fitted are a few little 0.1uf to the limit switch inputs on the BOB...I don't have anything on the driver inputs...can you explain more on this please?

Torch cable goes up and away from the machine although it does go close to the Z stepper ...strangely the Z stepper hardly ever faults!!

I'll check my shields and remove any 'duels'.

At the moment, I suspect that the drivers are too sensitive and the plasma is too noisy....aarrgghhh...why did I get into CNC :-))