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Ideal time between cracks? and Behmor
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russ5679
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Joined: 16 Mar 2005
Posts: 27
Location: WI
Expertise: I love coffee

Roaster: IRoast
Posted Sun Apr 14, 2013, 6:29am
Subject: Ideal time between cracks? and Behmor
 

First, what is the time gap I am measuring, it is the start of 1C to the start of 2C?  or is it the time between the end of 1C and the start of 2C?

I think the time gap people are talking about is from the start of 1C to the start of 2C.  If so, is there an ideal time gap that people shoot for?  I think I read in a few posts that people are often shooting for a 3 minute gap.  


The Rosetta Stone concept of the Behmor seems to be saying that you can't really control the gap, but if you use the Rosetta Stone you will at least know where you are in the roast.  

I have found the rosetta stone to be accurate, but should I be trying to control the gap (open door trick, or...) or is it best to just let the rosetta stone tell me where the roast is at and stop according to the roast level I'm after?
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jliedeka
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jliedeka
Joined: 1 May 2002
Posts: 1,561
Location: Madison, Wisconsin
Expertise: I live coffee

Grinder: Rocky Stainless
Drip: Technivorm, Chemex,...
Roaster: Behmor, heat gun
Posted Sun Apr 14, 2013, 8:05am
Subject: Re: Ideal time between cracks? and Behmor
 

I think, to some extent, it's going to vary with batch size.  It's a little easier to stretch out a finish by opening the door with a smaller batch.  I've only done 8 and 12 ounce batches and I can stretch the 8 oz ones a little longer.  I don't have any great time estimates for you.  It also depends on how dark I go but maybe 5 minutes for a 12 oz batch.

Overall, I'm pretty happy with all of my Behmor roasts.

    Jim

 
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Prof
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Prof
Joined: 10 Sep 2004
Posts: 715
Location: Seattle
Expertise: Pro Roaster

Espresso: PV Lusso
Grinder: Pharos 696
Drip: Aeropress
Roaster: Behmor 1600+
Posted Sun Apr 14, 2013, 8:46am
Subject: Re: Ideal time between cracks? and Behmor
 

Profile P2 works great to extend 1C, but you have to know when 1C starts to get it to be near the P2 temperature drop.

For example, what is working well for me using SM's espresso blends:  

P2 #1 with 250g beans.  The temp drop comes at 11 minutes.  Most of the roasts find 1C starting at 10:45 or so.  Voltage is usually 118V under full load.

You have to use P1 with new beans so you have an idea of how long it will take to get to 1C.

 
LMWDP # 010
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