Jonathan - Wow I like the amount of control/feedback you get with the plugin - This may be a future upgrade! Thanks for the collet tip

m_c - Thanks for the step by step info - the motor tuning page of mach 3 scared the crap out of me to begin with but its starting to make sense now - I will give this a try when I get the spindle fixed......I somehow managed to snap off the gx16 connector off the top of the spindle. Luckily I had planned to replace the 3 pin gx16 with a 4 pin one to earth the spindle and have the parts ready to install :)

Jim