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 Roasting Out or Controlling Acidity
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| HarryDog |
Posted on 02/05/2023 5:13 PM
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 1/4 Pounder  Posts: 171 Joined: July 20, 2022 |
I have had far too many roasts that are terrible acidic and very winey. I have roasted all over the place with my profiles and had some flat cups but not allot. The batch size is 215g each, FC 375F and FC380F I tried to roast a little longer than last time to see if I can tame more of that acidity. Will cup in 4 days but the chew test has the Indonesia bean a little more funky acidity then the Monsoon Malabar. I have attached pictures of the Artisan Roasts. Any obvious suggestions? The ROR looks a bit odd.
HarryDog attached the following images:
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| renatoa |
Posted on 02/06/2023 2:50 AM
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 Administrator  Posts: 2591 Joined: September 30, 2016 |
I would push the FC in the minute 7 ballpark. About RoR evolution, how do you control the heat ? May I guess that the RoR bumps are related to fan changes ? |
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| HarryDog |
Posted on 02/06/2023 7:13 AM
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1/4 Pounder Posts: 171 Joined: July 20, 2022 |
So move (Delay) my FC closer to the 7min mark. I'm only using one temp change on the ramp up (using a Amazon SCR) but 5 fan changes to keep the temp climbing. Can delay the temp change a bit and use less fan changes (2) and see what it looks like. |
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| renatoa |
Posted on 02/06/2023 8:15 AM
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Administrator Posts: 2591 Joined: September 30, 2016 |
Or, if fan control allows, many small fan changes, combined with heat changes of same magnitude, in order to keep RoR smooth. Reducing the fan changes count will led to even bigger RoR bumps. Beware to the fan change right before first crack... it could exacerbate the flick if you are tempted to decrease fan, in order to calm the beans jumping. A heat reduction compensation is necessary in that moment, to attenuate the flick, then immediately heat should be restored, to not crash (too bad) Sketched on your Indonesia roast the moments (red arrows) where you should be prepared to compensate for the flick, in order to keep RoR on blue track.
renatoa attached the following image:
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| HarryDog |
Posted on 02/07/2023 6:09 PM
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1/4 Pounder Posts: 171 Joined: July 20, 2022 |
I can do a slower climb (Heat & Fan change) then drop heat before the flick and up after it. Do a run to see if I lengthen out the roast and smooth the curve and ROR. If not enough can try a fan change as well, try and go slow as not to create huge swings. |
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| HarryDog |
Posted on 02/10/2023 7:02 AM
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1/4 Pounder Posts: 171 Joined: July 20, 2022 |
Taste comparison of previous Monsoon Malabar roast and current posted above, notes on the Indonesian roast. Previous is poor, taste testers did not like it, could only drink it with cream and sugar. Was a mess of flavors all muddled, powdered chocolate with weird acidic musk finish. Current Roast is much better, cleaner cup. More silky chocolate with a musk finish, much less acidity then last roast. Still would like to improve and will try the changes to improve this taste. It has a leather, earthy musk aroma, not for the timid coffee drinker. The Indonesian is a bit too acidic, I will need to lower that to balance this taste and see what other flavors are covered by all that acidity, could be a all round good cup, I hope. |
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| renatoa |
Posted on 02/10/2023 8:26 AM
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Administrator Posts: 2591 Joined: September 30, 2016 |
And the changes that led to above roasts... ?
Edited by renatoa on 02/11/2023 6:14 AM |
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| HarryDog |
Posted on 02/11/2023 5:37 AM
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1/4 Pounder Posts: 171 Joined: July 20, 2022 |
Sorry a busy week and had the roast data at home. This is the roast I'm comparing the current one to. Now it has some strange data in it that I think was noise or a loose connection. I have since re run the cables cleaned the ends so I have a better connection on the Thermocouples and added a USB isolater, I still have the odd glitch but I think that might be noise from the neighbors large hot tub or my fridge/freezer kicking in. Will probably put one of my power conditioning UPS's on it had see if I get rid of all of it or not?
HarryDog attached the following image:
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| renatoa |
Posted on 02/11/2023 6:33 AM
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Administrator Posts: 2591 Joined: September 30, 2016 |
Strangely synced with the development phase... And the two glitches are opposite, that can't happen in a real process. And also so fast... My best guess is as well that they are coming from the measurement chain. The most intriguing fact remains the coincidence with a roast phase... |
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| HarryDog |
Posted on 02/11/2023 7:19 AM
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1/4 Pounder Posts: 171 Joined: July 20, 2022 |
When I started using Artisan all looked ok for about 15-20 roasts then I started getting some strange junk, I don't believe it was real data either. Cleaning things up looks to have corrected it so far. I have not installed the latest version of Artisan yet. I do get the odd small bump that might be noise from the power line, moves both at the same time and amount very quick. This was only twice so far. This is a clean install of win10 so maybe look for anything I don't need running. Edited by HarryDog on 02/11/2023 7:32 AM |
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| renatoa |
Posted on 02/11/2023 8:00 AM
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Administrator Posts: 2591 Joined: September 30, 2016 |
I would have active all the time the serial monitor, to inspect the raw data from process when this happens. Latest version is not always mandatory the best. I am still on V1.x for some reasons. |
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| MaKoMo |
Posted on 02/11/2023 9:37 AM
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1/4 Pounder Posts: 123 Joined: April 06, 2011 |
For which reason are you still on v1.x1? |
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