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JackH
OfflineAdmin
· 06/05/2020 5:38 PM
peveleth, It is better if you start a post in the forum with your question. These shouts go away in time.

peveleth
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· 06/05/2020 3:10 PM
For Gene Cafe Roasters I have an older Gene Cafe Roaster. Temp fluctuates probably showing age. Question: For recent owners of the newer Gene Cafe Roaster, your opinions?

her63
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· 06/02/2020 9:10 AM
keep healthy bro, love roaster form home

pisanoal
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· 05/27/2020 10:14 AM
Anyone else have issues seeing the whole window of a thread when accessing from a mobile phone? Any fixes?

allenb
OfflineAdmin
· 04/02/2020 4:50 AM
Morning Ed, I haven't done any green coffee hoarding yet but am hoping the supplies don't end up like the toilet paper isles!

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Fluidbed Roaster project
cdrake39

Quote

JackH wrote:

He did a nice job documenting that project!


I agree! Not sure if he is a member on this forum or not - but I'll mention it to him
 
cdrake39
So I'm beginning to wonder if my issue with 'spouting' of the beans is more so related to the shape of my reducer? The steep vertical edges and nearly flat bottom may not be conducive to lofting the beans. I could order a conical reducer (like many others have used), or maybe tack weld an appropriately sized funnel inside the bowl reducer. I guess before I go down that road, do you folks think it may provide a significant improvement?
cdrake39 attached the following image:
bowl_reducer_rev.jpg
 
Vitreous
Maybe post a video so we can see what its doing?
 
cdrake39

Quote

Vitreous wrote:

Maybe post a video so we can see what its doing?


Just posted a short video on YT. The spouting seems minimal which is my main concern. The fan power should be sufficient as it was used in another build (referenced a couple posts back) and capable of spouting 250g. So I assume the issue lies with the airflow in my particular setup? Maybe caused by a combination of things (heating element blocking adequate airflow, bowl reducer geometry not "funneling" beans to center, or air flow too high and static pressure not sufficient). Appreciate any feedback you may have!



https://www.youtube.com/watch?v=pJOSb...JOSbQFh4zE
Edited by JackH on 04/28/2020 4:23 AM
 
CharcoalRoaster
Maybe not enough bean mass to get 100% circulation of the spouting bed?
 
cdrake39

Quote

CharcoalRoaster wrote:

Maybe not enough bean mass to get 100% circulation of the spouting bed?


Not enough? Or too much? I can try 250g this evening to see how it looks!
 
CharcoalRoaster
I was thinking not enough because there's not enough weight of the mass to replace the beans being fluidized. Then again, I'm not scientist or engineer just a serial DIYer lol
 
CK
I'm pretty sure you'll have to get a conical reducer as jbrux4 uses. Without that type of reducer, there will likely be dead spots not circulating the beans on the bottom edges/corners of your roast chamber.
 
cdrake39

Quote

CK wrote:

I'm pretty sure you'll have to get a conical reducer as jbrux4 uses. Without that type of reducer, there will likely be dead spots not circulating the beans on the bottom edges/corners of your roast chamber.


Yeah, I was thinking that may be an issue. My plan is to 3D print a conical reducer to test that theory (without the heating element wired in of course). If it proves successful, I'll either opt for the tri clamp style reducer, or weld a stainless steel funnel inside the bowl reducer to achieve the same effect. Thanks for the advice!
 
cdrake39
I 3D printed a conical reducer to test whether or not that would improve the agitation of beans. Seems like a minimal improvement, but it's difficult to tell. See video link below:



The specs of my blower are 7kPa (20"H2O) static pressure and about 28 CFM airflow. Perhaps this just isn't sufficient? Or maybe I'm overthinking it and expecting too much agitation lol
 
pisanoal
I think it looks like there are less dead spots in the video with the conical insert.

I'd say that is probably sufficient for the beginning of the roast. It should get a lot better as the roast progresses.
 
Husamka
I need your advice, which of these attached RCs design is better for beans circulation for 500-700gr capacity?
Husamka attached the following images:
61-wxind2l_ac_sl1500_.jpg 61b3pfcoqcl_ac_sx679_.jpg
 
CharcoalRoaster
The one on the left (first). The bowl shape might have dead spots when it drops into that little section on the other one.
 
Husamka
CharcoalRoaster, Thank you. I was thinking the right one has more capacity but still smooth circulation is more important.
Edited by Husamka on 05/07/2020 12:20 AM
 
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