How to calibrate Jura ENA3 coffee maker?

Need help getting my Jura ENA3 coffee machine properly calibrated. Have removed everything down to the grinder burrs. There is a round off-white trim ring that has holes along the edge. What’s the precise method to calibrate this ring for my ENA3? Have tried several methods but still getting Fill Beans message or it makes a tiny bit of coffee. Help please!! Thx so much. Our family owns 3 of these machines so trying to get them cleaned and fixed for our daughters families.