[Homeroast] Quest M3 improving the roast with Larger Batches

Hank Perkins hankperkins at gmail.com
Mon Feb 14 18:30:24 CST 2011


Yea, 175 is a good size.  I have done that a couple of times in trying
to work up to the 230g goal.  For me it was better than 230 but not
quite 125 which is why I worked the time angle.  I will bust into the
samples Wednesday.

On Mon, Feb 14, 2011 at 6:24 PM, ricky carter <rickylc99 at gmail.com> wrote:
> Hank,
>
> Thanks for the detailed info.  I'm ver much looking forward to reports on
> how these taste in the cup!
>
> I have been trying a number of different batch sizes and 175g seems to be
> working best for me at the moment.
>
> I will definitely give your methodology a try as I really would like to get
> back up to 1\2 lb batches with optimum results.
>
> On Mon, Feb 14, 2011 at 4:18 PM, Hank Perkins <hankperkins at gmail.com> wrote:
>
>> Afternoon.  Over the last month I have been working to get the flavor
>> equivalent from a 230g batch that I get from a 125g batch.  This has
>> been a challenge.
>>
>> Around 1 Jan I got the Quest thermcoupled, and purchased the Omega
>> HH806AU Data Logger. I have this connected to my Mac running Artisan.
>> This gives me a real time graph of the roast.  To get the particulars
>> here go to Home Barista and search for Artisan.
>>
>> The biggest advantage I have found is watching the graph develop and
>> asses the rate of change for the ET and BT.  With 125g I can hit 1C at
>> 7-8 min.  What I have attempted to to with the 230g load is mimic the
>> time and bend the curve as to slow the rate of rise from mid C1
>> through EOR allowing the flavors to develop.  Today was my first time
>> to accomplish this successfully.  The issue here is how low the temps
>> go after charging.  With 125g I will hit ~250 with 230g I will hit
>> 200.  Please note, I am not anal about absolute temps here.  Changes
>> in the beans, bean charge temps, ambient temps, humidity, a gram here
>> a gram there IMO is not going to make substantial differences.
>>
>> Here is what I did.  I Charge the roaster between 400 and 405 degrees
>> with the Amps set at 8 and the fan barely blowing I want ET and BT
>> rising when I charge.  With 230g the BT will drop to ~200 degrees
>> (+-10).  Once the ET begins to drop I run the temp wide open.  When
>> the ET begins to climb I begin adding fan speed.  I don't want to kill
>> my rise here.  I want to go hot  I want the ET to be between 625 and
>> 650 with my fan speed between 6 and 7.  At this point I am along for
>> the ride.  As my bean temp gets between 5-10 degrees from where it
>> will hit C1 (between 380 and 405 depending on the bean) I begin to
>> back off on the amps but not much and not fast.  Some beans like the
>> jimma require a quicker reduction some don't.  Once I hit C1I pull the
>> amps down to 5 and within 30-45 seconds I ramp the fan wide open.  Now
>> If I do this right 1/2 way through C1 the curve will bend and flatten
>> out. I then ramp the amps back up and cut the fan back down after 45 -
>> 60 seconds.  Generally I want to keep the ET here above 550 depending
>> on the bean. I dropped the beans once they hit C2.  Once the roasts
>> were complete the look and smell was identical to roasting 125g
>> batches.
>>
>> With the 5 roasts I did today I hit it in every case except the Monkey
>> Espresso Blend.  I was not successful in bending the curve here.  I
>> expect this has to do with the different origins of the beans in the
>> blend.  Maybe Tom will weigh in here without disclosing the magical
>> formula.
>>
>> In a few days I should be able to report on the success or failure
>> from a taste standpoint. But the time and profiles were real close.
>>
>> Hank
>>
>> _______________________________________________
>> Homeroast mailing list
>> Homeroast at lists.sweetmariascoffee.com
>>
>> http://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_lists.sweetmariascoffee.com
>> Homeroast community pictures -upload yours!) :
>> http://www.sweetmariascoffee.com/gallery/main.php?g2_itemId=7820
>>
> _______________________________________________
> Homeroast mailing list
> Homeroast at lists.sweetmariascoffee.com
> http://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_lists.sweetmariascoffee.com
> Homeroast community pictures -upload yours!) : http://www.sweetmariascoffee.com/gallery/main.php?g2_itemId=7820
>



More information about the Homeroast mailing list