This is the instrutions that were given to me when my spindle lost orientation. My machine has an O-M controller so maybe it will help. I will give the word for word and you can decide what is relevant and my machine is the 1300:
Most of the 1300 machines used a Fanuc Ocontrol with S series drives. These machines use potentiometerson the orient board to adjust the spindle. Take a look at the spindle drive. If there is a small board with a series of pots on the
left side and three blue colored pots on the lower right then it is an S series. Use the 3 pots on the lower right to adjust the orient position. These pots establish binary position for the spindle. You must press the reset button and issuean M19 comand after changing the pot positions.
The new style machines use alpha series drives. On the machines use parameter 4077 to alter the stop.
Again these were given to me...the pot part worked on my machine...its just trial and error till you get it right.