For Okuma lathes, the Program Start, Tool Change, and Segment Start formats must output a special sync code along with a change in spindle speeds.
A sample from a Segment Start format for an Okuma post is shown below:
<IF><CSS-ON><THEN G96 S<CSS-SPEED><32> <ENDIF> <IFNOT><CSS-ON><THEN> G97 S<CALC-SPEED><32> <ENDIF> <SPINDLE><COOLANT>{P<SYNC-SPEED>} <EOB> <MOTION> X<X-COORD> Z <Z-COORD><EOB> <ENDIF>