[Homeroast] Relationship of Cracks and Roast Stages

sci scizen at gmail.com
Thu Feb 10 17:19:31 CST 2011

I hit 2C around 220C or close thereto above. Hear the soft cracks by lifting
the chute door. I'm trying to hone my skills of knowing what is going on
even if my TCs are not working correctly.

Thanks for the synopsis. I prefer lighter roasts 50% of time and look for
the milestone of the end of 1C, then look at color of the beans from the
trier. I'm not yet able to use texture as a guide, but I will start paying
attention. I look at my roasts under a 10x loupe, but not while roasting. C
is rougher than C+ and beyond.
So, if I hear ANY 2nd cracks, then I have hit FC+? Often when trying to hit
FC, I will let the early outliers of 2C be my guide for the dump.
Thankfully, I can hear well and the Q is quiet. I do use temperature, but I
don't fully trust my cheap TCs frankly. I have seen how easy it is for a
probe to be off by 7-8 degrees.


> Date: Thu, 10 Feb 2011 04:57:24 -0500
>> From: Robert Bedwell <rlb at triad.rr.com>
>> To: "A list to discuss home coffee roasting. There are rules for this
>>        list,   available at http://www.sweetmarias.com/maillistinfo.html"
>>        <homeroast at lists.sweetmariascoffee.com>
>> Subject: Re: [Homeroast] Relationship of Cracks and Roast Stages
>> Message-ID: <DA084AE2-25F7-4718-9E98-A14915E36907 at triad.rr.com>
>> Content-Type: text/plain; charset=us-ascii
>> Ivan, at what temperature are you hearing 2C?  My hearing must be really
>> bad because I have never heard it on the Quest.  I normally exit the roast
>> at around 428-434 depending on how the beans look.  So far this has worked.
>> I am going to continue with 8 oz loads.  Right now most of my roasts are
>> in the 13.5 to 15 minute times with the 1C starting at around 9-9.5 minutes.
>>   If I am roasting 4 loads but have noticed that the first roast is always
>> the
>> one that I have trouble keeping at the 15 minute time.  I am sure that I
>> have not been pre-heating the Quest especially when the ambient temperatures
>> are in the 50's.  I am going to start pre-heating for at least 20 minutes
>> before
>> starting the first roast to see if it reacts faster.
>> I took the drum out after the last session and cleaned it after 10 roasts.
>>  I was surprised that I hardly got anything off the drum while the pipe,
>> chute and cooling chamber were caked with coffee oils.  Soaking the basket
>> in carfiza and hot water
>> made it look new.
>> I continue to be impressed with the quality of the parts and the assembly.
>> Don't know why but Yemen Sanani takes on a different life with the Quest
>> vs the Hottop.  It appears to have more flavor depth and not quite the
>> earthy flavors....more like an Ethiopian Dry.
>> Bob

More information about the Homeroast mailing list