Sette 270 update

Dear Reader,

I have been using the grinder daily for over a year.  The grinders ability to transport ground coffee into the PF without any disturbance of the particle distribution in the powder is the best I have ever seen.  (See original posts). A true on-demand design that works.

However the small burr, 21mm, turning at a high rpm creates a new problem.  The bean-feed is inconsistent.  The bean hopper is not the problem here, the beans have a consistent column pressure entering the grinding head.  I think the beans often bounce around before the burrs grab them due to the small size and high rpm.  This creates two problems for the barista trying to control the flow rate into the cup. (Our goal is about 26ml in 25 to 31 seconds from 20g ground coffee)

First, as you probably know, turbulence in the bean feed creates a coarser grind, speeding up the flow rate. But critically the grinder is producing different dosages as the bean-feed fluctuates.  And, as I remind my baristi all the time, achieving an accurate dosage is the single hardest technique.  Perhaps the 270W, that weighs each dosage would be a good investment for anyone considering this grinder.  (We tried weighing the dosage seperately and gave it up, too slow for Vivace in a slam).

Etzinger is making a commercial unit, the ETZ Max super heavy with 42mm burrs…perhaps the wait for a true gourmet on-demand grinder is over? My suspicion is that the rpm is still too high…I will let you know.