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Flour sifter upgrades.
Josh025
https://imgur.com...
I had a thought a few weeks ago to add insulation to the roasting chamber of my sifter and a stainless steel funnel under attached to the heat gun to help mitigate cold drafts from mixing with the air supplied by the heat gun. The results are encouraging. I saw a more stable RoR in both my ET probe and BT. And a more even final roast that finished promptly with first crack at ten minutes.

I dropped my roasting temp on the heatgun to 650 for the slow start and 750 to finish. That's down from 750 and 950-1000 respectively. So I call it a win. Just wanted to post so everyone else could benefit as well!
Edited by JackH on 05/07/2020 6:00 PM
 
renatoa
An idea for your next restless tinkering session :) what about using a reversed turbo oven lid, with stripped down glass, instead hot gun ? ;)
DIY: TO based IR 750g
Moded commercial: Dieckmann RoestMeister, Nesco, popper(s).
TC4ESP, MS6514, USB/Artisan/Apps, PID controllers
Grinder: MBK Feldgrind, mod'ed Porlex to 47 conical burrs, vintage PeDe Dienes, Kinu M38
Gaggia Mini, Aeropress, drip
 
Josh025
haha well i'm quite happy with how this works so far. I've been modding my g2 roaster the week before. I took the burrs and taped them together and used them to sand the burr holders flat. The alignment is just about perfect now for the burrs.
 
renatoa
What happens with chaff in such machine ?
 
JackH
Nice setup Josh. It is looking like the Apollo command module!
---Jack

KKTO Roaster.
 
allenb
Yes, nice setup indeed. Very even roast color throughout what I can see. Let us know how the roast performs in the cup.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
Josh025

Quote

renatoa wrote:

What happens with chaff in such machine ?


The unit is fairly sealed and the chaff is taken up the flex pipe to waiting folgers tin. i usually spin the beans much faster than during roasting after the roast has finished and the heat gun is in the cooling phase. it allows the beans to stay in the warm chamber just a little longer but the higher speed of the sifter arms spins most of the chaff off the beans and up the pipe.
 
Josh025

Quote

allenb wrote:

Yes, nice setup indeed. Very even roast color throughout what I can see. Let us know how the roast performs in the cup.

Allen


It's a Guatamala huehuetanango from Happy Mug. It's a great every day cup. the acidity is lower than other guatamala's i've tried and it's incredibly smooth in the cup. It has some chocolate notes as well as citrus. Finishes clean. I can't really complain about it for the price.
 
Josh025
https://imgur.com...
https://imgur.com...
UPDATE: Added a small stainless steel bowl to the top of my funnel. Drilled some 3/16 holes in it to act as a heat diffuser, and bonus! The bowl seals off the bottom of my roaster. No more ambient air entering the chamber unless it's by design. That's a natural yirgacheffe test batch from earlier. Just need to iron out my rate of rise. Too many flicks and crashes.
 
mtbizzle

Quote

Josh025 wrote:

https://imgur.com...
https://imgur.com...
UPDATE: Added a small stainless steel bowl to the top of my funnel. Drilled some 3/16 holes in it to act as a heat diffuser, and bonus! The bowl seals off the bottom of my roaster. No more ambient air entering the chamber unless it's by design. That's a natural yirgacheffe test batch from earlier. Just need to iron out my rate of rise. Too many flicks and crashes.


Hey Josh! I like your setup. How has it been working? Thanks for adding the pictures and details, I think I may use several of your approaches in my attempt at a popper sifter roaster. The 'window' you made is cracking me up. The window looks surprisingly simple design, but I'm curious how you got it to fit so neatly. Where are your thermocouples run / placed in this?
Roast: Kaldi wide, SR800, various other projects
Grind: Niche, Bunnzilla WIP, Commandante
Favorite equipment/approaches: Decent, La Pavoni, iced prismo aeropress (Tom's recipe), Hario switch, Hoffman-style french press
 
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