G76 TOTO NO FURTHER A MYSTERY

Or do you may have program it at 0 degrees if you'd like to operate a end later on? Sorry for that questions but I've to have this this all found out just before I pop a 12' shaft With this lathe that needs threads. Something little if I messed it up wouldn't be a big offer, but scrapping a twelve" dia. x 12' prolonged shaft is kind of A different.