"... So that the poor coffee beans nothing happens, there is the contact between bean grinder and reliably prevents a device. Just by poking / follow up on manages to bring the grinder to grind. Probably the machine has just something against my supermarket Robusta? "
So, stay away then it'll work ...
I have to fill the mill in use the Aero press and it works brilliantly, the ejection fits perfectly into the Aero press cylinder and so nothing falls next.