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Thread: Leaving Beans in grinder Hopper?

  1. #1
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    Leaving Beans in grinder Hopper?

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    If your a regular drinker of coffe, which of course, most people here are, if you fill your hopper with 250g of coffee, is it OK to have it stored in there if it will most likely be consumed in a week or less. Just how long does it take a coffee bean to get stale after its been taken out of its prefered environment?

    Sime.

  2. #2
    Avi
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    Re: Leaving Beans in grinder Hopper?

    Hi Sime,

    Personally I would never leave coffee open and exposed to air/light/heat, unless it has just come out of the roaster. I would advise you to store your coffee in an airtight container, and feed the grinder just before you are about to prepare a brew.

    Coffee does go off, even in whole-bean form. As to how long it would take for fully exposed coffee to go off? I dont know, I have never left coffee beans exposed for very long (except immediately after roasting).

    Cheers,
    Avi

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    Re: Leaving Beans in grinder Hopper?

    Hi Sime,

    One of the great problems with coffee is that people disagree on everything!

    Youre essentially weighing up two things: exposure of beans vs consistency of grind.

    Personally, I try to keep about 125g in my hopper so that I eliminate that popcorning effect. This tends to last me one to three days, depending on how many other people I make coffee for and how many sink shots I pull.

    I didnt really appreciate the extent of the popcorn effect in screwing up grind consistency until a few weeks ago at Maling Room. I had some blend or other that I couldnt remember and had brought enough along to seriously dial in both the grind and the temperature and then make some shots. I had just enough left for one double and thought might as well. I ground up the same dose that had been giving me very consistent pours before and got a pour that was a bit too fast. (No, it didnt channel.)

    Conversely, the coffee that I have most enjoyed recently has been 5-9 days post roast ... sometimes even more than that, so Ive got absolutely no problems with leaving beans to age in the hopper before then. In fact, I tasted a bunch of coffee the other week that was four days old and way too fresh, despite having been left in open bags.

    ... but my advice to you is not to just do as I do. As with all things coffee, try both!

    Cheers,

    Luca

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    Re: Leaving Beans in grinder Hopper?

    Anybody know what exposure to light does to beans? Ive read that light is detrimental but I cant recall the rationale.

    The degree of roast seems to impact fairly significantly on best use window. Ive kept my roasts relatively light lately and it *takes a few more days for the beans to lose some of that early sharpness than my usual 2nd crack plus a bit roasts.

    What Im trying to get around to, is that if your beans are of a fairly light roast then theyve probably got a longer life expectancy in the hopper than a dark roast.

    Im constantly mucking around with micro blends (50-100g) so the hopper on my grinder stays fairly empty.

    luca
    In your experience, does popcorning only ever make the grind more coarse? Ive had baristas tell me they think it makes the grind finer?


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    Re: Leaving Beans in grinder Hopper?

    I have no problem with leaving a few hundred gram beans in the hopper for a week at a time and do it myself, with the usual caveats, as in do not expose to heat & light which means, not next to a window please! ;)

    With regard to "popcorning effect" and whether it results in finer or coarser grind....probably very much depends on the individual grinder and the type of adjustment "mechanism" designed in...suffice to say we reckon it does not give the right grind one way or the other and the grinder cant really be expected to function "in precision" without a certain minimum quantity of beans in the hopper.



    Regardz,
    FC.

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    Re: Leaving Beans in grinder Hopper?

    Nice answer, FC. Framey, I really havent experimented too much with popcorning to give a definitive answer - I prefer using my grinder in a way that works :P I guess we could start a separate thread and ask people for their experiences ...

    Framey, totally agree on the light roasts lasting longer thing. I read somewhere that some roasters are using their drum roasters with a lower air flow and higher drop temp so that they effectively get a dark roast with a lighter outside, preventing the oils from coming out as early. Dont know if that makes sense to anyone with a drum roaster ...

    Cheers,

    Luca

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    Re: Leaving Beans in grinder Hopper?

    OH something else I wasnt aware of,

    since I dont usually go through a lot of beans, and thinking keep beans fresh till I want to grind them, I have been only putting in to Rocky what I was going to use, and yes sometimes I thought I wasnt getting consistent results, (but neither have I attempted the teflon tape mod).
    Wasnt aware of this "popcorn" effect.
    Can one of you learned persons explain a bit more please, and is it more or less significant with Rocky than some other grinders?

    Also I have found that if I put a lot of beans in the hopper to grind them all at once (for other people), the beans often tend to hang up and not flow properly anyway, (mine is fitted with the plastic thingy that is supposed to do something....)

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    Re: Leaving Beans in grinder Hopper?

    Oops that picture of Zena isnt supposed 2 be there...

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    Re: Leaving Beans in grinder Hopper?

    Quote Originally Posted by Judy link=1138058473/90#91 date=1146630089
    The instructions for the Sunbeam actually tell you to do that. Something about the weight of the coffee helps the grind.
    Quote Originally Posted by Mal link=1138058473/90#92 date=1146668066
    This is more or less the same advice proffered by most Grinder manufacturers, its just to ensure that beans entering the grinding chamber/throat of the grinder do so with a similar force from one grind to the next. The finger guard doohickey above the grind chamber/throat has a dual purpose in that its main purpose is to ensure that no matter what quantity of beans is filling the hopper, only the weight of the beans under that guard or "diffuser" is actually pressing on the beans below. If the full weight of the beans in the hopper were to be allowed to press down on the beans in the narrower section of the hopper and grind chamber, you would be forever unblocking the entry to the grind chamber as the beans are locked together or "bridging" the throat.
    Im probably the "Other persons" using your grinder ;) and so I hunted around and found this that might answer your question.

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    Re: Leaving Beans in grinder Hopper?

    No Xena here either?? :-?

  11. #11
    TC
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    Re: Leaving Beans in grinder Hopper?

    Agreed- we teach to try to maintain at least 4cm in depth of beans in the hopper at all times...

    Chris

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    Re: Leaving Beans in grinder Hopper?

    Ive started doing this - leaving about 100g of beans in the hopper, and I havent noticed any adverse affect in taste. I put about a days worth of beans into the hopper (2-3 shots worth + a bit extra) and top up at the start of each day.

    My espresso is tasting better, but thats probably because Im pulling longer cooling flushes...much sweeter!

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    Re: Leaving Beans in grinder Hopper?

    Thanks to Rayzurhed, 2MCM (Chris) and mattyj, for your comments.

    Now I am going to complicate things a bit,

    Often on weekdays I use Rocky to grind some of my beans to suit a plunger and take that to work, then in the afternoon when I get home Im grinding for Silvia.
    Ive adopted the click-clack lid on the grinder hopper which enables you to blow out most of the grinds left in the chute (another great CS forum idea), but so far have always been doing this with an empty hopper.
    Wondering if this would still work with 4cm of beans still in the hopper?

    Oh and is that 4cm measured from where?




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