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Topic: Question about grinding one cup espresso at a time. (10 msgs / 237 lines)
1) From: A
I was told by a vendor that if I only put enough beans for my single espresso in a hopper (on a MACAP M4 for instance) and grind them through I will get a popcorn effect of the little pieces at the end going up in the air and not grinding consistently with the rest. The alternative is load on more beans, then go to the trouble of removing them all from hopper, but then he said there will always be about 12grams remaining in the area between hopper and exit chute. So, basically there is no way to grind one cup's worth and have it consistent in grind and fresh (not day old)? Is this really true? All comments welcome.
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2) From: Sandy Andina
Cover the "throat" of the hopper with a tamper, forcing the little  
pieces at the end to go back down into the burrs.
On Sep 30, 2008, at 5:39 PM, A wrote:
<Snip>
Sandy Andina
www.myspace.com/sandyandina
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3) From: raymanowen
I have a grinder. For espresso drinks, I weigh nothing, just spoon the whole
beans from the Mason jar level in the double filter basket. (Grinders make
ultra poor storage devices for coffee.) Misuse of tools is a form of
prostitution. Who needs training for SNAFU espresso? I'm trying to beat it.
Dump the basket of beans into a sandwich ZipLoc, press it flat with a folded
towel, seal and put in freezer for  5- 10 minutes. Check grinder setting-
0.0118" burr spacing has been good lately- Toss into hopper. Grind heaps the
filter basket. Tap it down below level, "puff" grinder with bellows,
grinding into frothing pitcher. (Lose none want not)
Heap remaining grounds into basket, tap down level again. Very light rock
and wobble of the tamper, twist off and it's all good.
I think "a vendor" has a certain mind set that blocks experimentation and
learning. My Condolences.
If you don't try anything new, you're bound to keep on samin'. Gravity and a
few puffs of air, along with the slide at the bottom of the hopper.
The Costa Rica C+ roast didn't really impress my Celtic Critic right out of
the FR a couple of hours ago. "Good, but not the best- keep workin' on it,
Old man."
Cheers, Mabuhay -RayO, aka Opa!
Progress takes some risks. Same old same old is Stone Age insurance...
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4) From: Mike Koenig
Anyone else have any direct input on this "popcorn" effect - and
actual differences in the cup?  I tend to apply the laws of physics,
and conclude that the pieces that are bouncing around are about a few
millimeters in size, and the burr spacing is quite a bit smaller,
anything that might happen to the beans when "popcorning" will quickly
get negated when passing through the burrs.  Because of this logic,
I've never worried about it, and only scoop what I need for a shot
into my hopper.
Has anyone ever done a comparison, and seen any differences, or is
this another one of those myths that require debunking??
I think a lot of vendors that sell the grinders we are interested in
approach the issue from the point of view of a commerical user.
--mike
On Tue, Sep 30, 2008 at 6:39 PM, A  wrote:
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5) From: Kris McN
Mike,
I think A's concern is that the full amount put into the grinder doesn't get
ground due to the popcorn effect when you load the grinder for a single
brew.  Also, some amount of grounds stay in the chute and don't make it into
the doser.  Both of these phenomena mean you're not getting the expected
amount of grounds out into your portafilter (or whatever) relative to the
amount of beans you load.  I don't think anyone's suggesting that the grind
itself is effected.  Sandy's right, the way to deal with this in part is to
weigh down the beans in the throat of the grinder, commonly done with a
tamper that just fits in the throat.  I use the canning-funnel-hopper mod on
my Super Jolly (like pictured on this HB threadhttp://www.home-barista.com/forums/mazzer-super-jolly-mod-session-t4047.html)that includes using a cheap stainless steel tamper to weigh down the beans
once I put them in the grinder.  That stops the popcorn effect.  As for
grinds left in the chute, I use a little brush Bob Holland gave me (thanks
Bob!) to brush them out.  Some people use the click-clack lid or eggstractor
or sink plunger to blow them out.
Best,
Kris McN
On Wed, Oct 1, 2008 at 6:04 AM, Mike Koenig  wrote:
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6) From: Angelo
What I do is to measure my amount of beans with the PF basket, pour 
the beans and cover them with the basket. Since I will be puffing air 
later via the clik-clak or eggstracter, I don't worry about the few 
parts of beans that might be lying about in the many nooks and 
crannies of the Rocky hopper. They will all be flushed down by the 
air blasts...
Angelo
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7) From: Barry Luterman
Another good trick with Rocky is to cover the three screw heads in the
hopper with Scotch tape. This procedure insures beans will not get caught in
the depressions for the screw heads. Over time the beans dry out the tape
and allow for easy removal and replacement of the tape.
On Wed, Oct 1, 2008 at 9:23 AM, Angelo  wrote:
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8) From: raymanowen
Grinders make small coffee pieces out of whole coffee beans.
The Mazzer had years-old burrs in it when I got it. On the initial grind,
some coffee chunks jumped back into the hopper. So did the Solis M+ but more
so. After I swapped out the 10 year-old burrs with the new set, Nothing
jumped up into the hopper, awaiting the inexorable effect of gravity.
The old burrs were grinding better than my previous (new) grinder with
comical burrs- far less fine powder in the grounds.
Domenic had been telling the truth- he promised to send a "100% functional"
grinder that wouldn't necessarily have new burrs. "If not right away, when?"
I wondered when I ordered the new burrs...
After 2 years, I've seen a chunk or two fly up into the hopper. If they defy
the law of gravity and stay up there sometime, I could publish a paper on
the phenomenon and incur the wrath of an old engineering physics friend from
Mines. If one always ran the grinder with the classic hopper full of beans,
he'd never know, would he?
I don't recover more than maybe 4g  when I "puff" the grinder after
the initial grind. On a total grind volume of 14g in a level basket of
beans, I get little more out of the grinder than 75% basket full, + 25% more
after I "puff" the grinder into the frothing pitcher. Hoover takes care of
any stragglers at the end of the shot.
Not to be fractious, I think the vendor may be incorrect when he says the
grinder can stash 12g beyond the burrs, not being output to the doser or
grounds chute. Where are gravity and centrifugal force when you need them?
Cheers, Mabuhay and Magandang Hapon -RayO, aka Opa!
Vendors of used cars are known as Used Car Salesmen...
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9) From:
I only grind what I use at the moment. Perhaps he is right, but I am still able to get the golden rule with good results on my machine.
Dean De Crisce
Sent from a Treo phone.

10) From: Dante
Hi A,
I use a Macap M4 doser for single or double espresso dosing and I don't notice any degradation in grind quality after I finish grinding that single or double dose. I just close the hopper gate before I start grinding, so even if some beans bounce around in the last stages of the grind, they all get ground at the end of the cycle. I have a lens blower that I use to clear the chute after I start dosing the basket, and I blow all the ground coffee out of the doser through the dispenser with the lens blower. I tend to run the grinder a few more times in short bursts to eject any leftovers in the burrs out into the doser and from there to my filter basket with the lens blower assist. The system is very efficient - I consistently weigh out only 12 grams for a single and 18 grams for a double basket and the extraction on my M30 La Cimbali is perfect, time after time, with no wasted coffee grounds.
Cheers!
Dante
Date: Tue, 30 Sep 2008 15:39:39 -0700 (PDT)
From: A 
Subject: [Homeroast] Question about grinding one cup espresso at a
    time.
To: homeroast
Message-ID: <658196.41261.qm>
Content-Type: text/plain; charset=us-ascii
I was told by a vendor that if I only put enough beans for my single espresso in a hopper (on a MACAP M4 for instance) and grind them through I will get a popcorn effect of the little pieces at the end going up in the air and not grinding consistently with the rest. The alternative is load on more beans, then go to the trouble of removing them all from hopper, but then he said there will always be about 12grams remaining in the area between hopper and exit chute. So, basically there is no way to grind one cup's worth and have it consistent in grind and fresh (not day old)? Is this really true? All comments welcome.
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