coffee-forum.net
Promoting coffee discussion.

Main
Date: 24 Dec 2006 17:43:03
From:
Subject: Coffee tastes green: iRoast
Hi all

Just wondering if anyone else has come across this issue with the
iRoast. No matter how I roast I get a bitter green tasting coffee,
even if I roast well into the 2nd crack. The interesting thing is that
I had to get a replacement chaff lid, and it didn't fit quite right.
More air circulated through and the temp was significantly lower,
although I did not check the number. With this scenario I got great
tasting coffee. Once in awhile a baked batch, but not too often.

So what's the problem, you might ask? This iRoast went kablooey and I
purchased a new iRoast2. Now I am back to the original issue with
green tasting coffee. The taste does go away a bit (but not
completely) after resting, but I'm not always that proactive with my
roasting.

Any advice? What am I doing wrong, if anything, and what can I try
differently? I roast anywhere from 138 to 146 grams per batch on the
preset 2 with the iRoast2.

Thanks
Ruth





 
Date: 30 Dec 2006 17:01:46
From: JulesG
Subject: Re: Coffee tastes green: iRoast

Ton wrote:
> Ton wrote:
> > JulesG wrote:
> >
> >> Sorry Ton, I don't understand your question. Stage 1 in Randy's
> >> profile is already for 5 min. =E0 320... Please explain.
> >>
> >
> > You are referring to the 2nd profile, "For a longer, slower roast..."
> > (which Randy calls Profile 10), whereas I was referring to the 1st
> > (Profile 10), where he lowers the temp in the 3rd stage, and which you
> > called an interesting profile, lowering the temp.
>
>
> Edit:
> Profile 10, between brackets after 1st, should be Profle 8.

Try it ! You will see... You can even report it here.



 
Date: 30 Dec 2006 02:09:59
From: JulesG
Subject: Re: Coffee tastes green: iRoast

Ton wrote:
> JulesG wrote:
>
> >
> > Interesting profile, lowering the temp to increase fan speed.
>
>
> Maybe a dumb question, but what would happen if you make stage 1 for
> instance 5 minutes at 320*F ? In the first 3 minutes the temp will
> always climb to 355*F. So will the last 2 minutes also see an increase
> in fan speed, thus keeping the temp low(er) at first ?

Sorry Ton, I don't understand your question. Stage 1 in Randy's
profile is already for 5 min. =E0 320... Please explain.



  
Date: 30 Dec 2006 17:51:41
From: Ton
Subject: Re: Coffee tastes green: iRoast
JulesG wrote:

> Sorry Ton, I don't understand your question. Stage 1 in Randy's
> profile is already for 5 min. 320... Please explain.
>

You are referring to the 2nd profile, "For a longer, slower roast..."
(which Randy calls Profile 10), whereas I was referring to the 1st
(Profile 10), where he lowers the temp in the 3rd stage, and which you
called an interesting profile, lowering the temp.


   
Date: 30 Dec 2006 17:54:26
From: Ton
Subject: Re: Coffee tastes green: iRoast
Ton wrote:
> JulesG wrote:
>
>> Sorry Ton, I don't understand your question. Stage 1 in Randy's
>> profile is already for 5 min. 320... Please explain.
>>
>
> You are referring to the 2nd profile, "For a longer, slower roast..."
> (which Randy calls Profile 10), whereas I was referring to the 1st
> (Profile 10), where he lowers the temp in the 3rd stage, and which you
> called an interesting profile, lowering the temp.


Edit:
Profile 10, between brackets after 1st, should be Profle 8.


 
Date: 25 Dec 2006 07:11:29
From: JulesG
Subject: Re: Coffee tastes green: iRoast

Randy G. wrote:
> wootiegirl@gmail.com wrote:
>
> >Oh yeah. One more thing: I have tried the preset 1 and have tried to
> >reproduce the increased air flow/decreased temp with no luck yet.
> >
>
> If we assume that the coffee is good, and that you have correctly
> measured the beans (I like to use a gram scale), and that the beans
> are getting agitated properly during the roast, try:
>
> temp time
> I 320 2:00
> II 400 5:00
> III 390 4:00
> IV 400 2:00
> V 410 2:00
>
> For drip, 'eject' just as second starts or become active. For espresso
> stop when second is active.
>
> Let the roast rest a day, and if that does not produce good results,
> check the voltage at the outlet you are using, or try another outlet.
>
>
>
> Randy "" G.
> http://www.EspressoMyEspresso.com

Interesting profile, lowering the temp to increase fan speed. How long
can you roast with this profile ?



  
Date: 28 Dec 2006 19:59:10
From: Ton
Subject: Re: Coffee tastes green: iRoast
JulesG wrote:

>
> Interesting profile, lowering the temp to increase fan speed.


Maybe a dumb question, but what would happen if you make stage 1 for
instance 5 minutes at 320*F ? In the first 3 minutes the temp will
always climb to 355*F. So will the last 2 minutes also see an increase
in fan speed, thus keeping the temp low(er) at first ?


  
Date: 25 Dec 2006 11:20:26
From: Randy G.
Subject: Re: Coffee tastes green: iRoast
"JulesG" <jules.gobeil@videotron.ca > wrote:

>>
>> temp time
>> I 320 2:00
>> II 400 5:00
>> III 390 4:00
>> IV 400 2:00
>> V 410 2:00
>>

>Interesting profile, lowering the temp to increase fan speed. How long
>can you roast with this profile ?

It was one of the test programs I used in my review at:
http://home.surewest.net/frcn/Coffee/iRoast2.html
It was about 11:15 from start to manual cool, so it didn't get into
the 410 range. The graph of the roast is in the review. I was playing
around with "duplicating" the profile of the hottop for a taste
comparison. Sure- apples and oranges, but it was pretty close.

For a longer, slower roast try:

temp time
320 5:00
375 4:00
385 2:00
400 1:00
410 3:00

This one went for about 14:30.


Randy "how many roasters does it take to..." G.
http://www.EspressoMyEspresso.com




 
Date: 25 Dec 2006 06:04:55
From: myron
Subject: Re: Coffee tastes green: iRoast
Let me throw in an idea off the top of my head..
When you were roasting "cooler" you were getting better results.

could it be that you were roasting too hot before..getting the outside
of the bean well roasted, leaving the inside at a lighter roast
level...with the grassy taste??

myron



 
Date: 24 Dec 2006 17:45:46
From:
Subject: Re: Coffee tastes green: iRoast
Oh yeah. One more thing: I have tried the preset 1 and have tried to
reproduce the increased air flow/decreased temp with no luck yet.



  
Date: 24 Dec 2006 18:54:43
From: Randy G.
Subject: Re: Coffee tastes green: iRoast
wootiegirl@gmail.com wrote:

>Oh yeah. One more thing: I have tried the preset 1 and have tried to
>reproduce the increased air flow/decreased temp with no luck yet.
>

If we assume that the coffee is good, and that you have correctly
measured the beans (I like to use a gram scale), and that the beans
are getting agitated properly during the roast, try:

temp time
I 320 2:00
II 400 5:00
III 390 4:00
IV 400 2:00
V 410 2:00

For drip, 'eject' just as second starts or become active. For espresso
stop when second is active.

Let the roast rest a day, and if that does not produce good results,
check the voltage at the outlet you are using, or try another outlet.



Randy "" G.
http://www.EspressoMyEspresso.com