Having an odd problem with incremental jogging, continuous jogging works fine, but if jogging set to .001" or .01" and jogging using the Mach4 screen buttons or MPG the motors are very rough and clunking and loosing steps. This makes small increment jogging impossible which is beneficial for lathe tool setup. I recently switched from Mach3 and it had no problems like this at all. Its hard to say if this is a Mach4 or Pokeys issue, but hoping someone else may have experienced this and could provide some suggestions.  I'd prefer to stay with mach3 but it doesn't support threading with Pokeys so have no choice but to upgrade.