If the coffee tastes thin, the device displays Fill beans even though there are beans in the container or the device only rinses and then grinds after grinding, then the grinder is probably worn out. The grinder is adjusted at the factory and ready for immediate use. E5 - E10 - E25 - E30 - E40 - E45 - E50 - E55 - E60 - E65 X30 - X70 - X90 - X95 - XS90 - XS95 - XS90 one touch - XS95 one touch Cappuccinatore - Evolution - M30 - Scala - Scala Vario - Ultra 201 - 300 - 401 - 500 - 601 - 801 - 3000 - 4000 - 5000 - 6000 All grinding units are ground to the correct amount of grind. This is why there is always powder residue in the grinding unit. The grinding units are provided with male connections. These may not fit into the older Jura Impressa machines such as the Impressa 500, Cappuccinatore,