Hi
Thanks for the input, I'm a Electronics Design engineer so problems with the electronics don't really worry me. O by the side, if you need any electronics advice, please ask as I would like to return the favour.

However, I do have a question Router motor - is appears to make a high pitched noise at about 1/3 speed, it occurs on and off load. It is not coming from the control board (as I have tried running it with the motor disconnected). Does not appear to be a mechanical vibration.

Do you know how the motor speed is controlled - i.e. is it DC voltage or do they use a inverter (therefore frequency controlled) which could explain the noise.

Regards
Dave

P.S. I am trying the machine out on plastic - so I hope the couplings and control board should hold out. I do a lot of Microcontroller programming, so G-codes should no problem (I hope!) - Not sure about the MACH3 manual its is a bit badly written, it appears to complicate some simple concepts. Still early days, so I might get use to it.