[Homeroast] Quest M3 Update

Hank Perkins hankperkins at gmail.com
Wed Mar 2 13:10:16 CST 2011


One other thing, I believe I can go 8 minutes to C1 without negative
consequences. But right now, for what I am trying to accomplish fast
and consistent is the goal.  I expect when I get close to 300g I will
be lucky to hit C1 by 8 minutes.

On Wed, Mar 2, 2011 at 12:55 PM, ricky carter <rickylc99 at gmail.com> wrote:
> Nice info!
>
> Thanks Hank!
>
> On Wed, Mar 2, 2011 at 1:41 PM, Hank Perkins <hankperkins at gmail.com> wrote:
>
>> I have an update on my attempts to increase the batch size with the Quest.
>>
>> I am using Thermocouples, an Omega Temp Data Logger, My laptop running
>> Artisan Software and a Master Pro LED heatgun to assist the Quest.
>>
>> Here are my findings:
>>
>> I have had success in increasing my batch sizes up to 260g (I have not
>> gone higher yet but think I can get to 300g without killing the flavor
>> profile). Flavor profiles are close to 125g batch sizes.  I hope
>> others will replicate my methods and report their findings.
>>
>> My hypothesis has been that length of roast is a leading contributor
>> to flavor profile assuming you start at the same charge temp (400f),
>> time length from Charge to C1 is 6.5 minutes to 7.5 minutes, and
>> maintain a 4-5 minute time length between the start of 1C and 2C.  The
>> challenge here is getting the roaster to act the same regardless of
>> batch size.  I only have limited amounts of the Jimma that will return
>> the bleuberry toaster waffle flavor and am saving this until I have
>> this process refined more.  For me, this particular coffee is the bean
>> which shows the highest level of flavor change depending on roasting
>> technique.  If someone would like to suggest a different bean, please
>> let me know.
>>
>> The real challenge here is ET temperature stability and the ability to
>> increase the temp when the temp is low or the charge weight overpowers
>> the heating elements.
>>
>> Basics of this are to keep the amps high, increase the fan speed as
>> long as you can keep ET stable or rising up to 6.5.  As batch size
>> increases above 200g, after about 1.5 minutes, I supplement the heat
>> with the heatgun (stuck down the tryer hole) until the BT is around
>> 300f.  Then I let the roast run it's course.  I try to keep the ET
>> between 625f and 650f.  as I hit 1C I open the fan up and cut the
>> amps.  usually to around 7.  Now, I do tweak the amps and fan all the
>> way through depending on the curves I see on the computer .  It the
>> temp is falling I increase the amps, if it is increasing I cut the
>> amps (please note these are very small adjustments).  Outside of
>> during C1 the fan doesn't exceed 6.5.  I have concerns it will dry the
>> beans out above that.  Also, I am able to increase and decrease the
>> temps with the amp control at 6.5 faster.  Often I ramp the heat up
>> after C1 depending on the rate of fall for ET.
>>
>> The cool thing this technique is if you have a tender bean (like the
>> Jimma) you know you need to extend the time from C1 to C2 you cut the
>> ET at the 6 minute mark regardless of batch size.  You can use 125g
>> batches to work up the best roast profile and then increase batch size
>> and replicate the roast.
>>
>> I am continuing to work this.
>>
>> 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