Thanks, first we are not caffeine sensitive so worst case if we drink it after 3:00 PM it might cost us some sleep. I emailed Jura the same question and their answer was that the next cup of coffee would be a combination of caffeinated and decaf, so if it matters throw it away. When I look into the hopper of the Z6 after the add beans indicator light comes on there appears to be a significant amount of beans left so I'm not so sure about one cup worth. If you were really concerned my guess is two cups. Now the Giga 6 is the best answer but $6000.00 is a little pricey for the convenience.Decaf usually goes into the ground coffee chute after you grind it with a separate grinder. Because even you emptied the Z6 grinder, it still has a lot grinded coffee leftover inside which could be enough to kill a caffeine sensitive person.
Or you can buy a Jura with dual hoppers.
I Fix:In the grinder, you can find two bean monitoring sensors facing each other:
Whatever amount of coffee under these two sensors is the leftover, plus those already grinded on the other side of the burrs.
After the "Refill the hopper" notification comes on???????????????The only known number is it can hold 280g of coffee beans. Since the amount of coffee for each cup is different depends on your settings for different coffee drinks, the number of cups is a variable. It could be 14 cups or 28 cups.
I Fix:Yes, that's why I know there is a PURPOSE of that ground coffee chute on every single SUPER automatic Jura machine. If a grinder is too expensive for you, use ground coffee instead.