HomeRoast Digest


Topic: Roasting problem with the FR8 (16 msgs / 413 lines)
1) From: Bill Van Huis
I've been roasting now for about 2 months with a Freshie.  My problem is
this --- as long as I roast to 2nd crack, the coffee is wonderful. But any
less, the coffee seems to taste sour.  I use a Newco brewer or a pour-over
to make coffee, so water temperature isn't an issue, and I've tried
different levels of coarseness with the grind with no improvement.
I've also tried others' coffee that has been roasted to C+ and it turns out
fine.
I usually hit 2nd crack between 6:30 and 7:00, but sooner with some coffees.
I've been following the message board's comments about the FR8's super-fast
roast time, and the fast progression from 1st to 2nd crack.
Is the sourness on the lighter roasts one of the FR8's downsides?  Or is
there something I should try to improve the taste with the lighter roast?
I've got some Ethiopians on the way and I can't help but think I am going to
miss out if I roast them too dark.
Thanks in advance for your help.  I echo the other's comments about all the
great people on the board willing to offer help with this fantastic hobby.
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2) From: Floyd Lozano
This is likely due to underroasting the inside of the bean.  Roasting
too fast in these generally means you are turning the outside brown
but not the insides.  I ruined some Cup of Excellence El Descanso this
way, an entire lb, early in my roasting career before I figured this
out.
Try reducing the amount of coffee you put in by a bit, and see how the
roast fares.  If you're using ~63 grams now (which I believe is 2 full
scoops of many coffees) try with say, 55 grams, or 50 grams.  This
should slow down the roast a bit, so you may need more time to achieve
your desired level of roast, but this will give your beans a chance to
roast evenly all the way through.
-F
On Tue, Apr 15, 2008 at 1:17 PM, Bill Van Huis  wrote:
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3) From: Brian Kamnetz
I'll give your question a shot, thought I don't roast with a Freshroast.
I used to roast with a hot-air popper. If I am not mistaken, it is
similar to your roaster. I found I always had to go to the first snaps
of second or my roast was a bit sour, tasted underroasted. I think it
takes that long for the centers to get roasted. The outside is Full
City, but the inside is just barely City roast.
Brian
On 4/15/08, Bill Van Huis  wrote:
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4) From: Bill Van Huis
Thanks for the suggestion, on switching down -- I'll give it a shot. And I
never thought to try roasting at different times when voltage may be lower.
Maybe Saturday a.m. isn't the best time to try it. We'll see how it works in
the middle of the afternoon in July while everyone is running their AC.
On 4/15/08, Bill Van Huis  wrote:
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5) From: Bill
I think that Brian's and Floyd's thoughts are right on.  Just my 2 cents...
I use the freshie as my backup, like last week when I had another cold and
didn't want to stand outside with the HG, I roasted a few batches.  anyway,
i use 70g, and mine goes super fast, like 3 minute roasts, which i attribute
to elevation (6000 ft).  Anyway, the trouble is always the super fast move
from 1st to 2nd, but never with underroasted flavors.  I've underroasted
with my HG before, so i definitely know what that tastes like... but even
with a super fast freshie roast, i never had underroasted coffee in there...
 go figure.  And just as an aside, freshbeans is located in Park City, UT,
which has got to be 6000 ft, if not higher, so they must roast fast there,
too... hmmm.
and go with Brian and Floyd's advice.  it sounds right.  happy roasting!
bill
On Tue, Apr 15, 2008 at 12:53 PM, Bill Van Huis  wrote:
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6) From: miKe mcKoffee
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Yes, speed roasts almost impossible to do a decent lighter roast. The best
solution is split wiring for independent variable heater/fan control
allowing purpose designed tamed ramps and fully roasted light roasts. 
Seehttp://home.comcast.net/~mckona/PNWGVI.htmKona Konnaisseur miKe mcKoffeehttp://www.mcKonaKoffee.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">http://tinyurl.com/6tnabPacific Northwest Gathering VIhttp://home.comcast.net/~mckona/PNWGVI.htmKona Konnaisseur miKe mcKoffeehttp://www.mcKonaKoffee.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.
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7) From: John Despres
There are many ways to slow down a Fresh Roast 8. Less beans has been =
discussed.
Then you can slow down the FR8 by speeding up the fan. These directions =
from the SM site =http://www.sweetmarias.com/freshroast_fan_adjustment.htmltell you how =
to speed up the roast, but by moving the ring to the left, you will slow =
down the roast.
You can also throttle the roaster by dropping your dial to cool for a =
few seconds at a time - literally, 3 or 4 seconds and then run the heat =
back up. I did a Honduras San Marcos last week in, IIRC, 12 minutes and =
it was an awesome cuppa!
John
miKe mcKoffee wrote:
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-- =
John A C Despres
Hug your kids
616.437.9182
Scene It All Productions 
JDs Coffee Provoked Ramblings =
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8) From: miKe mcKoffee
Indeed there are many ways to slow down an FR. What I'm talking about is
many years proven tested method of real FR CONTROL, as in being able to run
any profile, consistently and repeatable, from 5 minutes to infinity on
demand. 
Sure lesser methods will work for lesser control.
Pacific Northwest Gathering VIhttp://home.comcast.net/~mckona/PNWGVI.htmKona Kurmudgeon miKe mcKoffee
www.mcKonaKoffee.com
URL 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.
Sweet Maria's List - Searchable Archiveshttp://themeyers.org/HomeRoast/
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9) From: gin
Bill:
Tough question here...
I have a FR 8 and will try to see whats up in the morning. I have not used it for a while but as I remember that was never an issue.
I will roast when the sun comes up and get back to you. Sevenminutes seems too long.
ginny
---- Brian Kamnetz  wrote: 
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10) From: Floyd Lozano
Although if you want total control and tunability, you wasted your
money on a Freshroast.  Buy a $3 thrift store popcorn popper and
rewire it.  You're just buying a fan and a heater anyway.  The
Freshroast is intended to be convenient, not an EE project =)
-F
On Tue, Apr 15, 2008 at 11:04 PM, miKe mcKoffee  wrote:
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11) From: raymanowen
I have used the FR successfully without any problems, even though the power
in my neck of the woods is 125v - 126v!
The FreshRoast can easily be throttled down with no additional gizmos. Just
advance the timer knob to Cool for 5s after 25s, for a total of 10s spent at
Cool out of every minute.
My roasts normally exceed 16 minutes in length, more like 20 minutes, total.
Cheers, Mabuhay -RayO, aka Opa!
Got Grinder?
On Tue, Apr 15, 2008 at 12:53 PM, Bill Van Huis  wrote:
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12) From: Bill
RayO,
seeing any additional wear on the heating element from the throttling on and
off?  Or is it perhaps good for it as it allows it to rest?  i appreciate
your experimentation with the freshie.  found your HG yet?
bill
On Fri, Apr 18, 2008 at 4:26 AM,  wrote:
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13) From: raymanowen
The heating element is not my concern- yet. The heater's microswitch,
operated by the cam on the mechanical timer, will probably go first.
You are right, though, the heater takes it heavy when you first hit it with
full power when it's cool. There is a fix for that, though. Back in the day
when the cheap-o radio was a 5-tube job with a series filament string on the
(121vac) line, if you add the filament voltages
35W4  - rectifier, w/ pilot lamp tap on the 35v filament
50C5   - beam power audio amplifier with 50v fil.
12AV6 - dual diode audio detector/ pre-amp 12v fil
12BE6 - pentagrid converter/ IF amp 12v fil
12BA6 - rf amplifier pentode 12v fil.
All the above is probably false- how long since I've even seen one? The
point is, I could make the radio turn on instantly, instead of waiting for
Hell to get cold while all the filaments got hot. It made a poor alarm, when
the radio warmed up slowly.
With a diode connected across the power switch contacts, the filaments
stayed at 50% power, even in the Off state, and I oriented the diode so it
put (-) on the 35W4 rectifier plate in standby (Off) state. The filaments
were at idle, but the circuit was dead with no HV.
A diode or an SCR could be connected across the FR microswitch terminals if
the heater fails due to thermal shock. It would also remove half the load
from the switch contacts, to boot.
The FR would be completely Off using an SCR with the gate floating, and
standby mode would bias the gate up to full conduction for 180 of the ac
sinewave. It still takes half the load off of the switch, if it ever fails.
Cheers, Mabuhay -RayO, aka Opa!
Got Grinder?
On Fri, Apr 18, 2008 at 9:04 AM, Bill  wrote:
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14) From: peterz
Huh??????
What did he say?
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15) From: raymanowen
With a diode bridging the switch contacts, the heater load will never be
turned off completely when the switch is open. The diode will conduct
current for half cycles. The heater will only switch from ~50% to 100%
power- much less thermal shock. The same as the vacuum tube filaments. -ro
On Fri, Apr 18, 2008 at 1:28 PM, peterz  wrote:
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-- =
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976
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16) From: peterz
Thanks, I needed that explanation. Always half on though.
Some days are better than others.
PeterZ
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