The Capresso Infinity may not grind fine enough for use with a Francis non-pressurized portafilter. As an alternative, you may want to take a look at the Baratza Virtuoso, Gaggia MDF, or the Rancilio Rocky. Each of these grinders will work perfectly with the Francis line of espresso machines and will also be able to acommodate other espresso machines if you ever decide to upgrade. For more information on these grinders, you can follow the links below. You can even compare them side-by-side when you click on the link to our Compare-O-Matic.