Never seen or heard about this before except with the driver a few revisions back and certain computers but unless you ave changed Mach Rev or Computer mobo then afraid I dont know
Hood
Thanks for the comment. Same computer, same sensor, same wiring, same operator (likely will prove ot be the problem ultimately). It is quite the mystery.
The only thing new is that I have introduced AC servo motors and 220V power, but even with all of that switched off, the DRO is still jazzed I went back to an older version of Mach and reinstalled including the pulse driver. Problem is still there. Next I guess I will delete the XML and reinstall again and reconfigure fro scratch.
My concern is that it is an interference issue and if so it may effect other more critical functions.
Incidentally, I am now an industrial AC servo drive convert. I just put an AC servo motor on my 4th axis that is about 1/3 the size of the DC servo and still has slightly more continuous torque rating. A little 200 watt AC servo motos on my X axis has more than twice the torque of the slightly bigger NEMA23 DC servo motor it replaced. Pretty impressive so far . . . .
Two words . . . AUTO . . .TUNING . . .