Tweakie,
First thing to say is I changed my CNC computer for a spare I have which was also running XP. No difference in control so I conclude the problem lies elsewhere.
Using your figures/instructions I set up the spindle pins which had not been my priority earlier. Obtained immediate control of the spindle speed and direction, great!!.
Noted that spindle speed does need setting up. Secondly no speed displayed in the DRO. Played about for s few minutes then Crash?? spindle stopped dead.
Opening up the covers revealed that the index plate had come loose and working up the shaft had jammed the shaft. Re-secured it but every thing dead, further examination
revealed a blown 5amp fuse. Replaced, and we had lift off with the spindle.
However neither X,Y, nor Z axis would move at all, not even in a singe direction as I had yesterday. Another blown fuse??. There is power to the driver control box, (red light ON).
Where from here??
Malcolm