HomeRoast Digest


Topic: Behmor Logic (13 msgs / 266 lines)
1) From: Julie Hershey Tieszen
Hi Homeroasters,
I understand, for the most part, the basic logic of the Behmor, ie....what 
adding time before or after the start of the roast does.
I've been roasting with my Behmor since last November. I nomally roast 1/2 
lb on P1 or P3 starting with the 1 lb option to get the maximum time. I 
found that when I did that it took a long time to reach 1st crack because 
the 1st 3 legs are also extended because the roaster thinks it sould be 
roasting 1lb.
So, what I've been doing on P1, for example, is to put in 1/2 lb coffee, hit 
the 1lb button. This brings up 18:00 min. I reduce it to 12 minutes before 
the start, which is what it would be if I had pushed the 1/2lb button. Then 
after it starts I add the extra time so that I can be sure to reach the 1st 
few snaps of 2nd which is where I usually hit cool. I also open the door a 
few times during 1st crack to slow it down a bit.
I'm not real picky about detailed profiles and such.....I like the art of 
roasting....I'm a HG/DB roaster too. But I do want to do the best that I can 
do. :)
Am I thinking about this correctly??
Julie
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2) From: Seth Grandeau
Julie,
If I understand it correctly, for P1, it's full power the whole time, so
adding time before or after start doesn't matter.  It's the other profiles
that will be affected by how you add the time.
On 5/18/08, Julie Hershey Tieszen  wrote:
<Snip>
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3) From: Julie Hershey Tieszen
Thanks Seth,
Wouldn't the ramp up time to full power also be extended if I add power in 
the beginning, even for P1? On the graph it looks like it takes the 1st 20% 
of the beginning roast time to reach full power. So if I start it at 12:00, 
it takes 2.4 min to reach full power. If I start it at 18:00 it would take 
3.6 min to reach full power?
Julie

4) From: Julie Hershey Tieszen
I meant add or subtract TIME, not add POWER as I wrote in my first sentence.
Julie

5) From: Seth Grandeau
Julie, I thought the ramp up to the first power setting just reflected how
long it takes the elements to heat up themselves, the roaster, bean mass,
etc.  I did not think that counted as a "phase", but I'm sure people with
more experience than I have will chime in.
On 5/18/08, Julie Hershey Tieszen  wrote:
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6) From: Bob Hazen
IMNHO....  The "ramps" on the Behmor charts are misleading.  I wouldn't try 
to read too much into them.  As I understand the operation, the Behmor makes 
steps in power; it doesn't ramp up it's power between stages.  The ramps on 
the charts give a qualitative view of what might be happening to 
temperatures somewhere in the system.  But, there will be an unknown thermal 
gradient so temperatures in the system or in the beans are tough to know.
It's probably best to ignore the ramps and go by Joe's text descriptions on 
the charts.  (i.e. P1 states 100% power for 100% time, but the chart shows a 
ramp to 100% over about 20% time.)  Some temperature somewhere in the system 
is possibly taking that long to rise, but who knows?  Somebody with a 
Kill-a-Watt hooked up can probably confirm that the power goes in steps, not 
ramps.
Bob

7) From: Rich
The graphs (chart) indicates the internal temperature as sensed by the 
thermocouple located on the right hand side between the three screws.
100% = 482
90% = 446
80% = 410
70% = 190
all temperatures are in degrees F
Bob Hazen wrote:
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8) From: Alchemist John
No, it does not count as a phase.  Speaking with Joe about this 
directly, he stresses the graphs are just for illustrative 
purposes.  P1 is 100% power through the elements 100% of the time (up 
to the up temp limit).  Don't read more into the graphs than was 
meant.  As Joe put it - it was a crappy little program he drew the 
graphs on and couldn't do vertical lines.
At 17:02 5/18/2008, you wrote:
<Snip>
John Nanci
AlChemist at large
Zen Roasting , Blending & Espresso pulling by Gestalthttp://www.chocolatealchemy.com/Homeroast mailing list
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9) From: Seth Grandeau
*"it was a crappy little program he drew the graphs on and couldn't do
vertical lines"*
There's something you never hear from the guys at Black and Decker. :)
On 5/19/08, Alchemist John  wrote:
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10) From: Julie Hershey Tieszen
Thanks Alchemist!!
OK. That makes sense. Can you address my original question with regards to 
P3 and P4?  If I push the 1lb button to roast a half pound.....should I 
deduct time to get the start time to where it would have been if I had 
pushed 1/2 pound? If you read my example below your response....just change 
it to P3 because I've also done it on that setting.
It my mind it seems like extending those 1st 3 legs when I'm just roasting 
half a pound would possibly bake it? It just seems to take way too long to 
get to 1st crack when I don't deduct the time at the beginning.
Julie

11) From: Alchemist John
No, Joe (and our Tom here) is an honest gem.
At 04:13 5/19/2008, you wrote:
<Snip>
John Nanci
AlChemist at large
Zen Roasting , Blending & Espresso pulling by Gestalthttp://www.chocolatealchemy.com/Homeroast mailing list
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12) From: Alchemist John
Julie,
Yes, in general, that is how I would and always do handle the 
profiles.  Regardless of the weight I am truly roasting,  I hit 1 lb 
so that I have the maximum possible amount of time and flexibility. 
Then I dial down to the appropriate time.  Overall, I like around 
10-12 initial start time for 8 oz on the p3-p5 settings.  A little 
shorter than the default recommended program.  Then, add time if 
needed.  Although, regardless, I doubt you would bake anything in the Behmor.
At 04:34 5/19/2008, you wrote:
<Snip>
John Nanci
AlChemist at large
Zen Roasting , Blending & Espresso pulling by Gestalthttp://www.chocolatealchemy.com/Homeroast mailing list
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13) From: Julie Hershey Tieszen
Thank you. My dad (a math teacher for 29 years) would be proud I figured 
that out on my own. :)
You made my day with the confirmation. I will roast on with confidence.
Have a good one!!
Julie


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