I've been using the E37s, in single dose mode, for about 2-weeks. I have a 58mm tamper in place of the hopper.Kleefisch wrote:Maybe interesting facts to note:
At my single dosing tests of E37S I saw no clumping or sticking of grounds (RDT applied). All fluffy ground in the metal cup, just as known by E37S when used with metal flap and Hopper.
Virtually zero retention without any help by air pumping (no bellows). But one time some beans stucked to the plain part of the turning burr and did not suck in. Maybe less RDT (less wet beans) or therefore the bellows of E37SD would have helped.
Grinding 18g to espresso took 20-25 seconds until the last bean was sucked in (if it did not stick to the burr).
I used a fresh medium-dark espresso blend, about a week after roast.
I've noticed the burrs create airflow, so when I move the tamper up and down it interrupts a vacuum. This works like the bellows and pushes grounds out (the tamper fits airtight, and can actually inject air like a plunger).. What I have noticed is every once in a while, after you think the single-dose is done grinding, an unexpected clump of coffee grinds comes out (maybe a gram)?).. I believe if I was not doing the tamper/bellows thing, that this coffee would end up being retained in the grinder (and maybe End up with an extra gram in the next grind).
This is making me wonder about grind retention versus 18 g in an 18 g out. There probably is a negligible amount of retention; I suspect 1/10th or 2/10th of a gram (using bellows or similar). Does anyone believe Having a very small amount of old grains mixed in would affect the cup or pulling the shot?
Also I would not do RDT unless you have the titanium burrs.. I am under the impression that the steel burrs could eventually rust, and also because titanium is more slick, RDT could create more retention.
I am 90% sure I am trading in for the E 37SD, because I want to do single dosing, and I'd rather have a grinder specifically designed for it.