DeanOK Senior Member Joined: 24 Sep 2012 Posts: 693 Location: OK Expertise: I like coffee
Espresso: QM Vetrano 2B Grinder: Vario W
Posted Fri Sep 28, 2012, 5:15pm Subject: How long does it take to clean out residual grounds from grinder on a superauto?
I have been trying some different roasts in my SA, and I was wondering how long it takes to get the residual coffee from one blend out of the grinder so that you are getting an accurate sample of the blend you are replacing it with?
Edit: To make myself more clear, I have run the grinder until no beans are left in the grinder, but I assume there is small amounts of coffee that will remain in the grinder blades for some period of time. My question above is how long does it take to when you are grinding a different blend does it take before you are getting a relatively pure sample of the grounds from the new blend that is not contaminated by the grounds from the blend you are replacing... I hope this is making sense.
diggi Senior Member Joined: 28 Nov 2011 Posts: 383 Location: Halifax, NS Expertise: I love coffee
Espresso: Spaz vivaldi S1 V2 Grinder: B Vario, OE LIDO Drip: Chemex, Espro Press,... Roaster: Poppery I
Posted Fri Sep 28, 2012, 6:33pm Subject: Re: How long does it take to clean out residual grounds from grinder on a super?
100% guessing here. Likely by the 2nd shot.
Many things would affect it including roast level of beans and how coarse the grind and what type of machine. One would assume that the grind retention would be such that the first shot would be contaminated, but likely not much by the second.
stefano65 Senior Member Joined: 30 Oct 2004 Posts: 1,415 Location: Eugene OR Expertise: Professional
Espresso: Vibiemme,Elektra, Grinder: Vario,Macap, Vac Pot: not Drip: not Roaster: not
Posted Tue Oct 2, 2012, 7:44am Subject: Re: How long does it take to clean out grinder on a superauto?
depending on the size of your chute most of superauto machines have the next shot basically in the chamber waiting so I will say that after 2 shots you should be ok or clean all the beans run the grinder until "empty" clean the best you can and introduce new beans
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