Hi Sean,
Progress!
That would be a tuning issue. Maybe reduce P Gain or Acceleration.in CCW ramps up nicely to roughly 1200 then down to 900 and then stabilizes at 1000 +/- 20 rpm and ramps down to Zero when the off Button is pressed .
Try changing the gains appropriately in your CW and CCW programs. Add it just before the Jog to speed command.CW just runs away as count is wrong direction
chan[SPINDLEAXIS].InputGain0=0.02;
or
chan[SPINDLEAXIS].InputGain0=-0.02;
HTH