HomeRoast Digest


Topic: Trying to isolate possible problem with iRoast2 (5 msgs / 104 lines)
1) From: Bill Goodman
I've noticed that the last several roasts made with my iRoast2 (using 
Ethiopia Organic Limu Indonesia Process and Guatemala Finca San Jose 
Ocana) look a little uneven, have been holding onto more chaff than 
usual, don't seem to have as much aroma, and are not venting nearly as 
much CO2 as I've noticed with earlier roasts.  Espressos made with these 
roasts also have less crema.  Line voltage has been fine, very close to 
120V AC at the start, and I've been aiming for lighter roasts than in 
the past, C+ or FC instead of FC+.  Could it have anything to do with 
roasting outside in typical warm and humid East Coast summer weather?  
With so many variables to attempt to isolate, I figured I'd prevail upon 
the collective wisdom here for some ideas?
Thanks!
Bill
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

2) From: Mike Koenig
Bill,
is your fan cycling between high and low speed?  In the warm weather,
my old iRoast would cycle to the high a lot more often than during
colder seasons, since the ambient air is hotter.
You may be holding onto more chaff simply because of the lighter roast.
--mike
On Fri, Aug 1, 2008 at 8:38 PM, Bill Goodman  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

3) From: Bill Goodman
Mike Koenig wrote:
<Snip>
Good question.  I'll have to take note next roast.
<Snip>
Does that have to do with temperature or duration?  That last one I ran 
(on Wednesday) was the 15-minute C+ profile that Ken B posted here a 
week-and-a-half ago.
Thanks,
Bill
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

4) From: Ken B
Bill....
What weight of beans is your roast?  I've noticed on my IR2 that 
depending on weight and the amount the beans expand, clingy chaff seems 
to happen when the beans expand enough to cover the opening at the top 
of the bean exchanger/chute.  e.g. 140 gram roasts have less clingy 
chaff than 151 gram roasts.  I usually roast 148-151 grams at a time, 
but with the Koratie WP and DP coffees, I am going to try 140 grams, as 
these produce a LOT of chaff, and they seem to expand a lot too, so I 
get a lot of clingy chaff.
The list says that the chaff is not a problem for taste, so I do not 
worry much about it.  I just rub the beans between my hands the break 
the clingy stuff up before I toss them to remove the chaff. And on my 
IR2, lighter roasts do seem to be a bit uneven.  The Koratie DP really 
points this out, going from very dark to almost white at a City roast. 
(422 f)
Best Regards,
Ken B
Bill Goodman 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

5) From: Seth Grandeau
In the warm weather, I liked to roast outdoors with the IR2.  When you hit
first, open the chaff collector on the top (careful, it's hot) and let the
chaff run free.  It will bleed off chamber temperature, get your beans
moving better, and get the chaff OUT.  I loosen the top but do not take it
off.  That way, you can re-lock it in place and get temps back up.  When you
hit cooldown, take to top off entirely and your beans cool quicker and any
remaining chaff flies away.
When roasting indoors, and using chaffy coffees, like IMV, I would never go
above 140 g, and sometimes stayed down at 130, for better results.
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