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Homeroasters - Home Roasting Coffee Community » BUILDING A ROASTER » Fluidbed Roaster

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Page 2 of 2: 12

1lb FB hopper roaster
HarryDog	#26 Posted on 10/30/2023 11:48 AM
1/2 Pounder Posts: 221 Joined: July 20, 2022	I think I see some issues, scorching and tipping in the middle and a bunch of under roasted beans in the top section of the picture, they can't all be Quakers. I want to add that when I download the picture and zoom in it does not look as bad as on the site, I do think you have some much darker beans and some much lighter. Some variation will always occur. I definitely think the bean movement needs to be improved, sorry. This might help. https://www.youtu...uu9T_34eHw Now this is more about a drum but just think of the bean movement, more air in this case. Edited by HarryDog on 10/30/2023 11:24 PM


nickr	#27 Posted on 10/31/2023 2:48 PM
Newbie Posts: 17 Joined: October 16, 2023	Bummer.... I've got some experimentation I'm going to try before building new hopper. Thanks for feedback!


HarryDog	#28 Posted on 10/31/2023 3:13 PM
1/2 Pounder Posts: 221 Joined: July 20, 2022	nickr, if you are thinking of using a deflector I was thinking of using a cabinet stainless steel knob but my current chamber is too small. Use some threaded rod, put a couple of nuts on it so it can be moved up or down for different loads. Just a quick item to see if it makes enough of a difference?


nickr	#29 Posted on 11/02/2023 10:33 AM
Newbie Posts: 17 Joined: October 16, 2023	What is the purpose of the bean deflector?


HarryDog	#30 Posted on 11/02/2023 11:15 AM
1/2 Pounder Posts: 221 Joined: July 20, 2022	It's one way to have the beans directed from the spray to the edge of the chamber so they can return back to the bean mass. Hopefully creating a faster bean rotation and keep them heating as evenly as possible. So in the FB if you increases the air flow it sprays up cooling the beans and keeping them out of the hotter bean mass, you want to keep them moving but in the hot bean mass as much as possible. This is a video demonstrating this from progen. https://www.youtu...h6cPI48_KI https://www.youtu...WDmXh_4_-E


nickr	#31 Posted on 11/02/2023 2:28 PM
Newbie Posts: 17 Joined: October 16, 2023	Figured, just making sure I understood the concept. I just purchased these https://www.amazo...mp;sr=8-15 Edited by allenb on 11/02/2023 6:32 PM


HarryDog	#32 Posted on 11/02/2023 2:35 PM
1/2 Pounder Posts: 221 Joined: July 20, 2022	Dollar store stainless steel bowls would work? Lots of sizes. Just a few taps from the inside in the bowl would give it a much rounder base. Coffee Crafters talks about the conical hopper, some info might help if you want to make other changes. https://www.youtu...HGhJyaGAZ4 Edited by HarryDog on 11/02/2023 3:05 PM


nickr	#33 Posted on 11/15/2023 7:59 PM
Newbie Posts: 17 Joined: October 16, 2023	Tried a roast with higher airflow, 60% the whole way. This is a wet process Bali. Was able to keep within good roasting parameters, FC at 7:50, drop at 9:50 (435f). Not sure it improved much. nickr attached the following image: Edited by nickr on 11/16/2023 8:42 AM


HarryDog	#34 Posted on 11/16/2023 1:36 AM
1/2 Pounder Posts: 221 Joined: July 20, 2022	If you watched the Coffee crafters video he talks about a more conical hopper to help with lofting the beans. This keeps the bean mass over the air flow. So he has a 1 7/8" inlet. The screen holes I used are 7/64 and biggest might be 1/8" if roasting smaller Peaberry beans. If the evenness of the roast is still poor then if you have a smaller cylinder 1-1.5" smaller slide it into your roast chamber and see how the beans will loft, it should improve. The other change you can do is use a deeper funnel for your base giving you more of a conical funnel shape to your roast chamber. I enjoyed my last order of Bali, just got some more in and will start roasting that again soon.

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