Hi John..

I am not controlling the spindle from the board.. The pulse width thingy may be to do with the wiring setup I have.. Z and y are using the onboard drivers (system3 board), and the x is a pair of PM752 drivers, just wiring the step and pulse into the 4th axis (no onboard driver).. Did not have this setup before, ran all three axis from the board.. This new setup was run from the previous Mach3 settings and had to alter various things to suit.. But the X axis has run flawlessly since I switched it on.. All these problems are to do with the z and y..

Steve..