HomeRoast Digest


Topic: Rebooting for roasting (10 msgs / 184 lines)
1) From: Mary Shue
Hi,
     Thanks, Chris, for info on roasting almonds in the Behmoor.  Mine are
on the cool cycle now.  Can someone refresh my memory as to how long I have
to wait before I can roast coffee beans this afternoon.  It seems like
someone recently posted a time interval to wait for the machine to
recuperate.  Thanks. Mary in A2
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2) From: Yakster
I believe that the recommendation from Behmor is to wait an hour between
roasts.
I know that some people short cut on this recommendation, myself included,
but since heat is the main cause of shortened life of electronics, this is a
personal call, as it could shorten the life of your roaster in the long
term.
-Chris
On Wed, Apr 28, 2010 at 11:46 AM, Mary Shue  wrote:
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3) From: Rich
IIRC its 30 minutes with the door open.
Yakster wrote:
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4) From: Mary Shue
I waited a little over an hour, I think.  I thought these beans were going
to be toast though.  I did my roast exactly like I did the last time only I
left the door open 15 seconds more (30 seconds total right before first
crack) and then when I went to open the door to speed the cool down (8:00) -
there were bonfire sparks going all over the place!  I was sure it was going
to be the beans but it turns out that I think it was just some excess chaff.
Smelled pretty bad.  Should I continue letting it cool down (that's what I
did this time) if it happens again or do something different.  I don't think
it was the Behmor, I really think it was excess chaff.  Any words of wisdom?
1/2 lb at 1lb, P1, B (20:00)
Opened door from 10:45-10:15
First crack 9:30-8:00ish
Total time 12 min plus cool time.
Mary in A2
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5) From: Ira
At 12:50 PM 4/30/2010, you wrote:
<Snip>
You're an engineer type, do you really think the fan cooled 
electronics would really get hotter on consecutive roasts?  Just curious.
Ira
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6) From: miKe mcKoffee
As an engineering type with many years field computer experience if the
Behmor electronic cooling was designed to be "adequate" when cooled between
roasts than yes indeed circumventing stated cooling between roasts could
cause spec'd circuit over heating and hence shorten it's electronic's life
expectancy.
Slave to the Bean Kona Kurmudgeon miKe mcKoffee
www.NorwestCoffee.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.
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7) From: Ira
At 12:52 AM 5/1/2010, you wrote:
<Snip>
Yes, but have you ever taken apart the machine in question?  What you 
say would only be true if the electronics somehow retained the heat 
of the roast between roasts?  Maybe it does, but It doesn't look that 
way to me.
Ira
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8) From: Jim Gundlach
Actually, you don't have to take the Behmor apart to see how hot the  
heating elements are.  The the heat resistant transparent covering is  
reachable.  If you hold a finger close to it you can tell if it is  
cool enough to touch and then you can go ahead and touch it knowing it  
is not hot enough to burn your finger.  After a cooling cycle the  
heating elements might be just a little warmer than their shields but  
not enough to have an impact on the life expectancy of the heating  
elements.  If you can stand touching the heating element shields, I  
can see no way that the residual heat would have an impact on the life  
expectancy of the heating elements.  The residual heat might have a  
slight effect on the roasting process but given that a thermostat  
shuts off the heat producing electricity at a set temperature, it  
should be an effect that is no larger than the difference between  
summer and winter roasting.
      In short, I am not going to spend any of my scarce remaining  
life time waiting between roasts for the temperature of the heating  
elements to cool an extra degree or two.
     pecan jim
On May 1, 2010, at 2:58 AM, Ira wrote:
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9) From: Yakster
I guess I like to error on the side of caution.  I've rebuilt many heat guns
years ago from people not running the cooling cycle in them and looked at a
lot of failure analysis reports on electronic equipment where heat is the
contributing factor for early failures.
The roaster wasn't built for continuous duty cycle so the decision is up to
the user.
-Chris
On Sat, May 1, 2010 at 5:49 AM, Jim Gundlach  wrote:
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10) From: Rich
The chaff will blow around and burn if you open the door.  you have to 
let it cool down a bit before opening the door.  Or just calculate the 
cooling time into the roasting profile.
Mary Shue wrote:
<Snip>
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