Hood, thanks for taking the time to reply,
Spindle relay IS in place, to the Homann Digispeed, as follows:
Enable port 2 pin 17
Output 1 to relay on Digispeed port 2, pin 16 (cw)
Typing M3 S100 in the MDI box turns on the VFD and I have 100 rpm at the spindle. Pressing the spindle start button with 100 entered in the speed select box has exactly the same result. (other speeds selected give different results at the spindle, but that's another issue)
Over the last 2 days I've tried moving the spindle index pin to other inputs (on both bobs), with exactly the same result..... no or innacurate spindle true DRO.
Regards,
Baffled, UK.