shadowfax wrote:Michael, the Robur E has a huge grind path due to the addition of the augur atop the burr set. If it spun at low RPMs, I imagine it might feed the burrs whole beans, but as it is it seems to cut them into smaller pieces before they load into the burrs. As near as I can tell, that adds to the Robur's already large path of smashed-up beans, although at least those particles between the augur and the burrs aren't fully ground. Add that problem to a covered chute that basically ensures that the grinding chamber and the chute are always full and a bit of a pain to clear out, and you have a difficult-to clean grind path that retains a lot of ground coffee when the hopper is charged and you've pulled a shot or two; 30-40g is probably a reasonable guess.

Then there's another problem that I've been thinking about lately, considering modding my own Robur to doserless. The chute is so large, and the grind chamber as well, that I don't know that the the path of the ground coffee into the funnel/hopper is even remotely a FIFO (First In First Out) queue. It looks like, under many circumstances, only a portion of the chute has moving coffee, meaning that, even though you might only have a small amount of stale coffee in the system, purging it by simply grinding more fresh coffee is potentially not going to work or require you to waste much more coffee than just the stale coffee that you're trying to get rid of. So, I've been thinking about shrinking my Robur's chute somehow to see if that will make it waste less coffee and create less static. My fear, of course, is that it will slow it down a lot and retain a lot more coffee.

shadowfax wrote:This could be mounting a static screen on the lid (so it comes off when you take the lid off, for cleaning), or it might mean that I get an aluminum block milled precisely to block off about 80% of the exit chute (pictured above).