HomeRoast Digest


Topic: Extending the first crack (13 msgs / 259 lines)
1) From: David&Marilyn Sheldon
Hi all,
Well Ive read almost everything about electric popcorn makers, mines a 1200W
240V unit which Ive attacked with a 20mm holesaw and its now truly well
ventilated. I have raised it about 20cm off the table, at an angle on a wire
grid and I have a fan blowing upwards directly underneath it, I also have a
long extension cord and I still cannot get beyond 3minutes 45seconds to
first crack! with smoke appearing at 5m 10seconds
What I have started doing in fear of not having the bean roasted all the way
through - is first placing the beans in a fan forced oven at 90 degrees C
and then turning up the heat to max - I leave the beans in there for 6
minutes - so when I remove them from the oven theyre just starting to turn
yellow and theyre at about 160C in temp - then into the Popper and on for 4
minutes..
How does this sound to anyone and am I baking the beans by doing this?
Appreciate yr comments before I toss the lot and buy an I Roast.
Thanks,
David - Australia
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2) From: Ira
At 09:35 PM 4/20/2008, you wrote:
<Snip>
When I started roasting with a yellow popcorn popper in the 80's one 
of the first things I did was put a switch in the line to the heating 
element so I could crudely control the temperature but turning the 
element on and off at will.
Ira
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3) From: Brian Kamnetz
David,
I can't tell from your post how much you are roasting at a time. One
really good way to EXTEND the time of your roast (i.e., slow it down)
is to DECREASE the amount that you are roasting. Cut by a third or by
half and see what happens.
Brian
On 4/21/08, David&Marilyn Sheldon  wrote:
<Snip>
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4) From: Rich
It sounds like it will work.  How does the coffee taste?
David&Marilyn Sheldon wrote:
<Snip>
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5) From: Bill
David, don't buy an Iroast, buy a heat gun.  a person who's gone to all that
trouble with the popper wouldn't mind a HG at all...  and I second what
Brian said, try decreasing amount....  and how does it taste???  baked
beans, in my limited experience, lack complexity and taste "like coffee," no
brightness or acidity or anything at all...
bill
On Sun, Apr 20, 2008 at 10:35 PM, David&Marilyn Sheldon <
sheldonfam> wrote:
<Snip>
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6) From: wncopeland
Hello,
    I have started roasting with a popcorn popper, the $10 version from Walgreen Drugs.  I have achieved, to my taste, good results.  Mine too raises the temperature to first crack in 4 minutes or less.  To extend the time, I have, quite crudely, just turned off the popper for 1-2 minutes, then back on.  It has worked well, even though it is not precisely repeatable.  Bill C.
---------

7) From: wncopeland
Hello,
    I have started roasting with a popcorn popper, the $10 version from Walgreen Drugs.  I have achieved, to my taste, good results.  Mine too raises the temperature to first crack in 4 minutes or less.  To extend the time, I have, quite crudely, just turned off the popper for 1-2 minutes, then back on.  It has worked well, even though it is not precisely repeatable.  Bill C.
---------

8) From: raymanowen
"...am I baking the beans by doing this?"
Well- do they not taste good?
The bottom line is, does your coffee taste good to you?
Keep notes, make changes in your roasting, grinding and brewing, then see
how it tastes. Note the changes that improve the flavor and aroma- the cup!
Cheers, Mabuhay -RayO, aka Opa!
Got Grinder?
On Sun, Apr 20, 2008 at 10:35 PM, David&Marilyn Sheldon <
sheldonfam> wrote:
<Snip>
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9) From: Allon Stern
On Apr 21, 2008, at 12:35 AM, David&Marilyn Sheldon wrote:
<Snip>
I have a 12V muffin fan forcing exhaust from my iRoast2. It is  
powered by a variable 0-25VDC power supply, allowing me to control  
the amount of airflow. I start off with it at 12V, and run the iRoast  
until I get to 1st crack, then slowly start ramping up the voltage  
'til I max it out. This has extended my roast times considerably. I  
just did some yemen and wasn't quite at FC when my profile ran out at  
13 minutes. I need to reprogram it to run the full 15 (I had  
previously left a couple minutes with the idea that I could adjust  
stage 3 up or down, but that hasn't exactly worked out)
Anyway, the muffin fan hasn't burnt up yet :)
I'm still experimenting with using the fan to draw out the roast  
times. I think the key is not to be too aggressive or you risk  
backsliding. A reduced rate of increase in temperature is what I'm  
after.http://www.radioactive.org/pix/roaster/-
allon
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10) From: raymanowen
With your variable ps, you could hook a couple of the fans in series and rig
them so one exhausts the iR, and one blows into the base. That way your ps
won't have to supply any more current than one single fan.
With the ps set at 24v, both fans will be blowing at full power, more than a
single fan could do at that setting, with much more device longevity- the
fans and the ps.
Cheers, Mabuhay -RayO, aka Opa!
Got Grinder?
On Mon, Apr 21, 2008 at 11:46 PM, Allon Stern  wrote:
<Snip>
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11) From: Allon Stern
On Apr 22, 2008, at 2:22 AM, raymanowen wrote:
<Snip>
Not a bad idea. I think I have another 12VDC fan lying around, relics  
from some old Sun 3/160's I dismantled before junking the carcasses.  
I used to actually use a 3/160 as my home computer (later a 4/260).
-
allon
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12) From: Frank Awbrey
David and Marilyn, am I understanding/reading it right that you have a 240 v
popper? Maybe that has something to do with the power/quick roasts?
I'm with wncopeland on this one. I have the same popper that he has (same
Walgreen's brand popper, that is) and doing the things you do, (tilting the
popper, long extension cord (100 ft)), etc. can get my roast time up to 9 or
10 minutes here when the ambient temp is around 50* F.
I have also turned the popper off and on 2 to 3 times during the roast to
extend its time. I do have a temperature probe in the popper and do keep a
close eye on the temps. When it starts to drop, I would turn the popper back
on. I picked random temps of 300 and 375* degrees to turn the popper off and
on, but always turned it back on when the temp began to drop (usually 30-45
seconds). This would extend my roast time a couple of minutes per roast. I
am not doing this right now because of the cooler temps outside. I never
baked the beans doing it this way.
Also, you might try running another instrument that draws quite a bit of
power at the same time/plug in that you roast. This might also help extend
the time.
Only other thing I can think of is to tear into the guts of it and do some
mods (of which I have no idea how to do).
On 4/22/08, Allon Stern  wrote:
<Snip>
-- 
Frank
"Still the one"
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13) From: David&Marilyn Sheldon
Thanks Frank & Mr Copeland for your interest - yes its 240V here in
Australia and the Popper is rated at 1200 watts so it should in essence give
the same result as yours - however today I have been shopping at the
hardware store and tomorrow will make some modifications to improve the
airflow and also fit a thermocouple to assist with improved prediction - I
also plan to add a few more 20mm holes here and there - Im soon going to
have to put up a danger notice due to all the holes ones fingers can poke
into.
happy roasting - Ill let you know how it goes..
Regards,
David
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