Coffee Roasting Momentum loss into first crack
@Slimfl08
Posted in Coffee Roasting
Momentum loss into first crack
Hey all,
I have been chasing my tail since jumping head first into roasting on the new to me 2018 MCR-1. I had a large learning curve on airflow where a lot of my first batches were super low and every cup had a very acrid aftertaste. Forward to now my airflow has been fixed (at least I hope) but I continue to have momentum issues into 1st crack and development. I have made my most recent roast public and provided a link (below). My gas schedule and fan settings are in the notes. My main question is am I lowering my gas too early (prior to 1st crack) or do I need a different charge temp and higher gas settings at the beginning. My goal for this roast was 390 drop or 10-15% development time. I seen I was crawling in development so decided to drop in order to not bake whatever little I ended up developing. Of note, most all of my roasts since I have began this journey have had issues here but I have been trying to take care of them one by one vs massive changes to everything. Thanks for the input in advance!
https://portal.roastpath.com/publicroasts/index/827021582921070625
unable to see your gas or airflow changes at all to comment
Thanks! I thought it would have made my notes public…guess not.
Charge = 415
Soak = 1 minute
Fan = 58
Gas = 2.4kpA after Soak
@ 280 degrees I moved my Fan to 65
@ 345 degrees dropped Gas to 1.4kpA
@ 355 degrees Upped Fan to 70
@ 365 degrees :46sec prior to 1st crack dropped gas to.6kpA
Hi @Slimfl08
The 7:00 marker in your profile where you say you drop fuel down to 0.6 around 365F is what's causing the roast to slow in RoR and lead to your lower finish temperature. A key indicator is your blue IT temperature data point where it starts to drop lower in temp pretty dramatically in comparison to the rest of the roast. The rest of your profile, leave the same.
At that 365 temp, go to 1.0 for gas and save your 0.6 adjustment when you are into development where you can see more clearly where your coffee is heading. This should all help you get to a higher finish temp in your profile and meet your DTR goal.
Happy roasting!
Sweet! Ill make the adjustment on my roast friday. Appreciate the feedback!
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