HomeRoast Digest


Topic: Study Best Grinder for Coarser Grind (24 msgs / 903 lines)
1) From: Barry Luterman
I had some free time today so I ran a small experiment using my grinders.
Now I have to spend the next hour or so cleaning them with minute rice.Here
are the results of the study.
                           Best Grinder for Coarser Grinds
Statement of the Problem:
It has been noted that dark roasted coffee often causes stalls while brewing
in a Vacuum Pot.  It has also been suggested that dark roasted coffee ground
with a conical burr grinder will stall more often than the same coffee
ground with a flat burr grinder. The final question is can stalls be avoided
using dark roasted coffee ground in high end quality grinders? This study is
designed to answer these questions.
Equipment and Materials:
The following equipment was used in this investigation:
Hot Top Programmable Roaster
Brazil Carmo Estate Peaberry coffee
Electronic Scale
Shark Mini Vacuum
Bodum Santos 8 cup vacuum pot with Cory rod
Kenmore 4 burner Gas Range
Wooden Chop Stick
Stainless Steel Kettle
Timer built into a Micro Wave Oven
Mazer Mini Coffee grinder
Cimbali Max Hybrid Coffee grinder
Procedure:
One half pound of Brazil Carmo Estate Peaberry coffee was roasted in a
programmable Hot Top roaster. The roast was extended through almost the end
of second crack. The roasted beans were weighed post roasting. A picture of
the roasted beans was taken and is available off list.
Both grinders were thoroughly cleaned to remove any residual lighter roast
grinds. The grinders were both set to coarse grind settings appropriate to a
Vacuum coffee maker. A total of four eight cup pots were produced. That is,
two eight cup coffee pots were made with the beans ground in each grinder.
The time that expired between the time water was first noted in the upper
bowl and the time the rod clicked was noted. The time was noted for the time
expired between the first drops of coffee entered the bottom portion, of the
pot, and the time air started to enter the pot.
The following procedure was used for all trials. Water was heated in a
stainless steel kettle on the power burner of the stove. The vacuum pot
bottom was placed on the simmer burner. Twenty four grams of coffee were
ground and added to the top portion. A Cory rod was in place. Hot water was
then transferred to the bottom section up to the eight cup mark. The upper
portion of the pot was placed on the lower portion of the pot. When two cups
of water entered the upper chamber the coffee in the upper chamber was
stirred using a wooden chop stick. The heat was then reduced.  After the
water completely rose into the upper chamber the pot was allowed to remain
on the stove for one minute.
Results and Conclusions:
The roast turned out with shiny completely oil covered ebony colored beans.
If anyone is interested I have a picture of the roasted beans and will send
it off list on request.
Mazzer Mini
Max Hybrid
Trial 1 Draw up Time 4 min. 42 sec.                             Draw up Time
3 min. 46 sec
            Draw dn. Time 2 min. 24 sec                              Draw
dn. Time 3 min 50 sec
Trial 2 Draw up Time 2 min. 24 sec                               Draw up
Time 3 min 45 sec
            Draw dn. Time 2 min. 48 sec                              Draw
dn. Time 3 min. 50 sec.
There were four pots of coffee made and none of them stalled. The conical
grinder results indicated longer draw down times then did the flat burr
grinder. However, it should be noted all draw down times were within an
acceptable time limit.  Draw up times are probably meaningless as water
temperature was not controlled. In true “Myth busters” tradition I deci=
ded
to try and force a stall. I re-adjusted the grinders for a coarser grind.
The grind obtained was one better suited for a French Press brew rather than
a Vacuum Pot. Results are displayed as Trial 3.
Mazzer Mini
            Max Hybrid
Trial 3 Draw up Time 2 min 32 sec                                   Draw up
Time 2 min. 18 sec
            Draw dn. Time 5 min 45 sec                                  Draw
dn. Time 4 min 59 sec
On trial 3 both brews acted as though they were about to stall but managed
to complete the brew process with a lengthened down time. It should also be
noted that the beans used for this study were over roasted. They were almost
burnt.
Given the limitations of this study (only 6 samples) some conclusions can be
drawn. Over roasted coffee can be used for Vacuum Pot brewing if a quality
grinder is used. The grinders used in this study still managed to produce a
non-stalled brew even when the grind was coarser than that recommended for
vacuum brewing. A conical burr grinder is probably just as effective as a
flat burr grinder for dark roasted coffees brewed in a Vacuum pot.
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

2) From: Ira
At 06:21 PM 5/15/2009, you wrote:
<Snip>
Not to be contrary, but which one of those two grinders is conical? I 
didn't think that either a Mazer Mini  nor a Cimbali Max Hybrid is a 
conical grinder.
Ira
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20

3) From: Doug Hoople
Hard to read tabular format in free-form text, but, if I'm reading
correctly, this is a summary.
1) All drawdowns ran long. None of the drawdown times was within the
"normal" range of 1-2 minutes.
2) All results showed drawdown deltas of 1 to 1-1/2 minutes between
conical-burr and flat-burr methods.
3) In two out of three of the tests, the conical-burr grinder drawdowns
were longer.
In all my testing, there have been flukes where the drawdowns were better
than expected at all points on the scale. Thus, only a series of tests at
any given level will yield consistent results. The third test may have been
one of the flukes. To be fair, any one of the three could have been a fluke.
This is pretty fluky stuff, and one-off data points are not reliable.
These are interesting results, though, Barry.Thanks for running the test.
Not all of us have the resources that you do.
Also, what happens when you run very coarse settings? How does the conical
compare to the flat? It may be going beyond the range of "normal" brewing,
but 1) it will highlight the differences between the two grinders in a way
that nothing else will, and 2) there's reason to believe that there's good
and distinctive vacpot coffee drinking in the much coarser ranges, given
certain changes in procedure (the subject of another thread).
Doug
On Fri, May 15, 2009 at 6:21 PM, Barry Luterman  wrote:
<Snip>
re
<Snip>
nd
<Snip>
of
<Snip>
s,
<Snip>
as
<Snip>
s.
<Snip>
nd
<Snip>
cided
<Snip>
up
<Snip>
aw
<Snip>
be
<Snip>
 a
<Snip>
ee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

4) From: Barry Luterman
The last trial, trial 3,used a coarse grind.It was a ground I would have
used for French press. Any coarser would definitely  have stalled from
either grinder. Draw down times were slower for the conical grinder but note
that at no time with either grinder did a stall occur. It might be so that
the flat burr grinder is better for Vacuum pots but the conical works also.
I use my Mazzer for brewed coffee only and the Max Hybrid is dedicated only
for espresso.
On Fri, May 15, 2009 at 4:47 PM, Doug Hoople  wrote:
<Snip>
en
<Snip>
s.
<Snip>
dy
<Snip>
er
<Snip>
al
<Snip>
d.
<Snip>
an
<Snip>
ce
<Snip>
 a
<Snip>
ee.com
<Snip>
ee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

5) From: Doug Hoople
One other question:
For an 8-cup pot of coffee, is 24grams a reasonable amount? Shouldn't it be
more like 48-64 grams?
Not that it matters that much. If there are fines doing the clogging, you
can clog with as little as a couple of tablespoons of ground coffee!
Doug
On Fri, May 15, 2009 at 6:21 PM, Barry Luterman  wrote:
<Snip>
re
<Snip>
nd
<Snip>
of
<Snip>
s,
<Snip>
as
<Snip>
s.
<Snip>
nd
<Snip>
cided
<Snip>
up
<Snip>
aw
<Snip>
be
<Snip>
 a
<Snip>
ee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

6) From: Doug Hoople
"I use my Mazzer for brewed coffee only and the Max Hybrid is dedicated only
for espresso."
The conicals, from everything I've heard, are untouchable in espresso.
Thanks again for taking the time, Barry!
On Fri, May 15, 2009 at 8:03 PM, Barry Luterman  wrote:
<Snip>
o.
<Snip>
ly
<Snip>
er
<Snip>
at
<Snip>
t.
<Snip>
he
<Snip>
te
<Snip>
at
<Snip>
he
<Snip>
ot
<Snip>
er
<Snip>
wo
<Snip>
up
<Snip>
rr
<Snip>
an
<Snip>
er
<Snip>
er
<Snip>
as
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

7) From: Barry Luterman
I use 3 scoops that weighed out to 24 gr. Always yeilds great tating coffee.
Didn't want to use more since I had roasted only a half pound and wanted to
make as many pots as possible. In daily use I have always used 24 gr.
Perhaps with my longer brew time it evens out.
On Fri, May 15, 2009 at 5:05 PM, Doug Hoople  wrote:
<Snip>
be
<Snip>
dy
<Snip>
er
<Snip>
al
<Snip>
d.
<Snip>
an
<Snip>
ce
<Snip>
 a
<Snip>
ee.com
<Snip>
ee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

8) From: Barry Luterman
Yes see the study I ran compairing the Mini to the Max for espresso. I can
send it to you off list.
On Fri, May 15, 2009 at 5:08 PM, Doug Hoople  wrote:
<Snip>
ns
<Snip>
ee
<Snip>
n,
<Snip>
aw
<Snip>
n I
<Snip>
re
<Snip>
ns
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

9) From: Doug Hoople
24gr for an 8-cup?!?! I've actually been taken to task on the list for only
using 48gr in my 8-cup! We just had a discussion with someone today who
wanted to know if 40gr was right for a 5-cup, and we recommended to go no
lower than 30.
Wow. Every day brings new information. I'd be interested in seeing how you
make that work!
Thanks.
Doug
On Fri, May 15, 2009 at 8:10 PM, Barry Luterman  wrote:
<Snip>
to
<Snip>
ou
<Snip>
he
<Snip>
te
<Snip>
at
<Snip>
he
<Snip>
ot
<Snip>
er
<Snip>
wo
<Snip>
up
<Snip>
rr
<Snip>
an
<Snip>
er
<Snip>
er
<Snip>
as
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

10) From: Doug Hoople
That wasn't so long ago, was it? Two or three months ago? I remember reading
about it.
On Fri, May 15, 2009 at 8:11 PM, Barry Luterman  wrote:
<Snip>
ut
<Snip>
 a
<Snip>
e.
<Snip>
's
<Snip>
is
<Snip>
st
<Snip>
he
<Snip>
or
<Snip>
um
<Snip>
ee
<Snip>
en
<Snip>
to
<Snip>
ion I
<Snip>
ld
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

11) From: Barry Luterman
Come to Hawaii.Actually I will be in Oakland and Walnut creek In July for a
family wedding. Time is tight but if I have some free time maybe we can meet
up.
On Fri, May 15, 2009 at 5:13 PM, Doug Hoople  wrote:
<Snip>
ly
<Snip>
ee
<Snip>
n,
<Snip>
aw
<Snip>
n I
<Snip>
re
<Snip>
ns
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

12) From: Doug Hoople
July? Cool.
I'll look forward to it! I'd rather check out your setting, with your
respectable gear and better procedures. The list thinks a lot of what you
do, so that would be a bit like visiting MiKe.
But it would be great to get together.
Let me know what your schedule looks like when the time gets closer.
Doug
On Fri, May 15, 2009 at 8:18 PM, Barry Luterman  wrote:
<Snip>
 a
<Snip>
no
<Snip>
't
<Snip>
g,
<Snip>
is
<Snip>
st
<Snip>
he
<Snip>
or
<Snip>
um
<Snip>
ee
<Snip>
en
<Snip>
to
<Snip>
ion I
<Snip>
ld
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
ee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

13) From: Doug Hoople
Sorry, thought that was on the off list thread. Too late. Not too personal
an observation, I hope!
Doug
On Fri, May 15, 2009 at 8:41 PM, Doug Hoople  wrote:
<Snip>
e:
<Snip>
e!
<Snip>
d.
<Snip>
er
<Snip>
at
<Snip>
tion I
<Snip>
er
<Snip>
ut
<Snip>
 a
<Snip>
t.
<Snip>
fee.com
<Snip>
20
<Snip>
fee.com
<Snip>
fee.com
<Snip>
fee.com
<Snip>
fee.com
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com
Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee=.com/gallery/main.php?g2_itemId=7820

14) From: miKe mcKoffee
A much more interesting and level playing field comparison with the Max
would be a larger flat burr grinder like Mazzer SJ or better yet Major.
While large conicals are king for consistency, they don't necessarily yield
the most lively shot. 
A Mini isn't in quite the same shot league as a Major or even SJ. For some
reason size does seem to matter:-)
Slave to the Bean Kona Konnaisseur miKe mcKoffeehttp://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must">http://www.NorwestCoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
Pacific Northwest Gathering VIIhttp://themeyers.org/HomeRoast/">http://home.comcast.net/~mckona/PNWGVII.htmSweet Maria's List - Searchable Archiveshttp://themeyers.org/HomeRoast/
 On 
<Snip>
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20

15) From: miKe mcKoffee
IF the 8-cups were 2oz demitasse cups then yeah 24gr might seem about
right... When talking "cups" in coffee brewing devices it's important to
determine what the term is being used to mean. Seldom (if ever) does it mean
8 fluid ounces. But heck I use 28gr fine ground for a single 16oz cup pour
over! (22gr for 12oz, 16gr for 8oz) Of course by the cup pour over takes
more ground coffee and I do brew on the strong side.
And different people prefer different brew strengths, not right or wrong. 
Slave to the Bean Kona Konnaisseur miKe mcKoffeehttp://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must">http://www.NorwestCoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
Pacific Northwest Gathering VIIhttp://themeyers.org/HomeRoast/">http://home.comcast.net/~mckona/PNWGVII.htmSweet Maria's List - Searchable Archiveshttp://themeyers.org/HomeRoast/
<Snip>
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20

16) From: Doug Hoople
The large conicals are king for consistency in the fine- to mid-range, but
they're on a much more level playing field as they go coarse.
I mean, who would you rather hear singing "Satisfaction"? Frank Sinatra or
Mick Jagger?
Even when you're the best, you can't do everything.
Doug
On Fri, May 15, 2009 at 9:08 PM, miKe mcKoffee  wrote:
<Snip>
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20

17) From: raymanowen
OK, this blows my mind:
"...trial 3,used a coarse grind. It was a ground I would have used for
French press.
Any coarser would definitely  have stalled from either grinder."
This is incredible. Tell me where I'm rong- the ultimate coarse grind would
be done with the burrs set so far apart that the beans are only chopped in
half. Easy to do with your Mazzer. In fact, you could set the burrs so far
apart that they wouldn't even touch the coffee beans between them.
<Snip>
on its face.
My experience is just anecdotal but repeatable. I wouldn't care to waste any
coffee to do so. I had done an espresso shot, grinding at 19. Ethiopia Harar
Horse Lot 30 was phenomenal. I couldn't wait to do a TV brew with a 48 grind
setting.
Naturally, I just set to 18, reasonable for espresso brew, not for the
intended TV paper #4 cone. Stalled immediately. Just got a few drops of No
Hint of Blueberry.
Not going to try the whole beans unless I can put a lever pump together that
can pull a vacuum first on the upstroke, admit hot water to equalize the
vacuum, then apply pressure on the downstroke using a ball check/ orifice on
a spring below the filter basket. It would seal the upstroke vacuum then
regulate the H2O pressure in the beans.
Maybe Tuesday after Wimpy pays for the hamburger...
Cheers, Mabuhay -RayO, aka Opa!
Got Grinder?
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20

18) From: Brian Kamnetz
On Sat, May 16, 2009 at 12:25 AM, Doug Hoople  wrote:
<Snip>
Now I have a swing version of "Satisfaction" running through my head,
complete with finger snaps....
Brian
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20

19) From: Doug Hoople
"Now I have a swing version of "Satisfaction" running through my head,
complete with finger snaps...."
Same here. My fault, I fear. My fevered imagination just added a big-band
horn break in the middle, too.
To be honest, it doesn't sound half-bad, does it? :-)
Doug
On Sat, May 16, 2009 at 10:38 AM, Brian Kamnetz  wrote:
<Snip>
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20

20) From: decrisce.md
Wow.  Serious work here. =
Sent via BlackBerry from T-Mobile

21) From: Barry Luterman
The hybrid has one conical and one flat.The study was designed to see if a
high end grinder could effectively grind dark roasted coffee for use in a
vacuum pot without stalling. Both grinders were able to accomplish that feat
albeit with increased draw down times. The Mazzer's draw down times were a
bit quicker than the Hybrid. However, neither grinder produced a stall even
when the grind was not optimal
On Fri, May 15, 2009 at 3:26 PM, Ira  wrote:
<Snip>
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20

22) From: Doug Hoople
The real finding for me in your study, Barry, is that, with a very dark
roast, no grinder can go coarse and get "normal" drawdown times. It's true,
you didn't stall.
If searching for perfect results, though, I don't think it's "effective" to
be getting drawdowns of more than 2 minutes. Imagine the uproar on the
espresso side if someone said that 45-second pulls was thought to be
effective.
There's still an outstanding question of whether flat burrs are more
consistent than conical when grinding coarse. Your results, while not
conclusive, would seem to add strength to that argument. But to make it
conclusive, it would have been necessary to go a bit coarser still and see
which grinder produced the first real stall. And then try it a few times to
confirm.
Or, to make it more realistic, grind some full-city roast very coarse, so
that the shattering of brittle, dark beans is less of a contirbuting
factor. And the compare drawdown times. With the lighter beans, there
probably won't be a stall, but I'll bet there would be a difference in
drawdown times, which would make a pretty good indicator of grind
consistency.
Interesting that the Hybrid is not fully conical.
Doug
On Mon, May 18, 2009 at 9:46 AM, Barry Luterman  wrote:
<Snip>
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20

23) From: Ira
At 09:46 AM 5/18/2009, you wrote:
<Snip>
The hybrid has a bean breaker that's conical, but the grinding is 
done by flat burrs. The advantage of the hybrid is the grind path in 
the flat burrs is much longer than an equivalent flat burr because 
the bean fragments are much smaller before they enter the burrs. Same 
burr idea as the Versalab and one other whose name I forget.  but 
it's not a conical grinder.
Ira
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20

24) From: Barry Luterman
I stand corrected on saying the Hybrid is a conical grinder. The fact
remains that the study was not designed to test differences in the grinders.
The study was designed to test if a high end grinder could grind over
roasted beans for a Vac pot that would not stall the pot. Nether grinder
stalled the pot but down times were faster for the Mini.However it was a
small sample and I am not sure if the grinds from each grinder were ground
to the same tolerance. I simply eyeballed and felt the grinds and from
experience said this is the correct grind to use for vac pot brewing. Later
I did the same thing when I ground for press pot.
On Mon, May 18, 2009 at 8:01 AM, Ira  wrote:
<Snip>
Homeroast mailing list
Homeroasthttp://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.comHomeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20


HomeRoast Digest