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Topic: First screening of grounds with a scale. (7 msgs / 132 lines)
1) From: R.N.Kyle
Jim I can't remember, is the Rocky a flat burr or a conical burr =
grinder. but it confirms my suspicions that all grinders produce a =
certain amount of dust. Good Job
Ron Kyle
Anderson SC
rnkyle

2) From: James Gundlach
The little AccuGem7 twin beam gram scale by My Weigh arrived today and this evening I had the time to do a little first screenings.  My first notes are below:
   The scales hopper holds about 2.5 grams.  So, I measure 2.5 grams for the dust screeening into
   the #60 screen.  With the Rocky set on the 6th nothc, I get 0.225 grams of dust.  The next 
   was to screen Ron Kyle's fine grind with the Salton flat burr grinder.  Out of 2.5 grams I get
   0.55 grams of dust.  I repeated the process with Mike McGinness' sample from a Solis with a new 
   burr and a worn lower burr.  Out of the 2.5 gram sample I got 0.88 grams of dust.
I may want to order a screen finer than the #60 to measure dust but I am going to go ahead and go with it for now.  I have a long weekend coming up so I should get full screenings of some of the samples done.
Jim Gundlach
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3) From: Mike McGinness
From: "James Gundlach" 
<Snip>
this evening I had the time to do a little first screenings.  My first notes
are below:
<Snip>
the dust screeening into
<Snip>
of dust.  The next
<Snip>
Out of 2.5 grams I get
<Snip>
from a Solis with a new
<Snip>
grams of dust.
<Snip>
going to go ahead and go with it for now.  I have a long weekend coming up
so I should get full screenings of some of the samples done.
Great work Jim. And what a measurable YUCK! Over 1/3 dust from my 1yr old
Maestro with new upper burr! Sure glad I'm using Rocky instead now:-)
MM;-) aka Kona Konnaisseur miKe mcKoffee
Way happy with Rocky grindin' - Miss Silvia brewin'
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4) From: Rick Farris
Jim wrote:
<Snip>
Whoa!  Are you saying that even in the very best case you're getting 10%
coffee dust?
-- Rick
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5) From: Mike McGinness
From: "R.N.Kyle" 
<Snip>
but it confirms my suspicions that all grinders produce a certain amount of
dust. Good Job
Ron Kyle
Anderson SC
Flat burrs. (Most answers to questions of this type can be found at
coffeegeek.com...)http://www.coffeegeek.com/reviews/grinders/rancilio_rockyMM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
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6) From: AlChemist John
Sometime around 22:56 1/17/2003, Rick Farris typed:
<Snip>
Don't forget that the "dust" is per se arbitrary at Jim's #60 screen.  It 
is all a matter of what you want to consider dust.  If/when Jim gets the 
finer screens, those numbers could well drop significantly.
On that note, how does one decide what is dust and what is fine ground 
coffee?  Particle size outliers?
--
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
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7) From: Rick Farris
John wrote:
<Snip>
I'd say everything after about 3 sigmas out.
-- Rick
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