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10/15/2021 2:19 AM
merlot85, maycondelpiero and hoeltz, Welcome !

10/14/2021 10:06 AM
Thanks for the addition to the group. Seriously considering building a drum roaster along the lines of oldgrumpus's. Love the design and craftsmanship.

10/14/2021 4:00 AM
Morning, ar3mia ! and... coffee drink

10/12/2021 11:55 AM
Evan Slack and CupOfJoe, Welcome !

10/07/2021 3:24 AM
Larry140, Roastiva and fkrauthan, Welcome !

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Cooling Tray attempt
broeker
So my parts have started arriving for my cooling tray & chaff collector........ So far so good.........
broeker attached the following images:
image_103.jpg image_104.jpg
chimpy74
that's some pretty cool looking engineering!!
Omega
Wow! That's what I call top-shelf, excellent fabrication.
Very impressive.

ThumbsUp

Barry
Mad Mac
Looks like excellent metal works. However I don't understand how it works or where it will be situated.
broeker
Thursday night update :-)
Got the chaff cyclone tacked up :-)
broeker attached the following image:
image_105.jpg
Lawnmowerman
In reply to post from Mad Mac: this is a larger version.
Lawnmowerman attached the following image:
20141119_110251-1.jpg

Bad coffee prevails when good coffee roasters stand by and do nothing.
broeker

Quote

Lawnmowerman wrote:

In reply to post from Mad Mac: this is a larger version.


Exactly :-) mine will also have the chaff cyclone under it....
broeker
This shows a little more of my design :-)
broeker attached the following image:
image_106.jpg
baysidedweller
broeker:
cool contraption!
I also looked into cyclone but decided to use the attached instead due to simplicity. The contraption I built is a bit amateurish but it works very well.
I have attached a photo of the key parts only.
The bean basket is slid-able and the reason why the suction head has so many holes and grooves is to control the bean flow into the basket, thus controlling the cooling while sucking the bean into the basket. The reason why there is a paper on the head is I drilled too many holes and the bean flow slows to a crawl. So I reduced the airflow from the sides and thus increases the bean flow.
There is a post in home-barista about positive and negative air flow during roasting and I commented that I find cooling under negative pressure reduces the undesirable flavors.
baysidedweller attached the following image:
cooling_001.jpg
broeker
Bay sided.... Your rig looks sweet!! Well fit for purpose:-)...... I need to collect chaff from 50-60 kg per day so hopefully have sized it properly...

Fab is progressing.... Had to add a 4" butterfly valve I didn't count on :-(
broeker attached the following image:
image_107.jpg
Lawnmowerman
Breoker: this build is beautiful. It's inspired me to put a stirrer on my cooler. It really doesn't need it. But I wanted one anyway. I'm going to make it removeable and set on top of the cooling tray. For ease in building. Then,since I won't be able to dump the beans in with a can opener motor on top, I will install a hopper. It's gonna look weird, but so do ALL my roasting related contraptions.Grin
Bad coffee prevails when good coffee roasters stand by and do nothing.
allenb
If I was very well off financially I would seriously plead with you to build me a custom drum roaster. You are incredibly talented and do remarkable fabrication and machine work!

Make sure to post photos of the whole setup when its all running as a package.

Wait a minute, I just noticed something on your cooling tray. Is that a trailer hitch ball above the dump chute?

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
broeker
Thank you Allen :-) Its more my location here in New Zealand that's a barrier than money :-) the sharing of ideas has been awesome...

I now have it all running....... It's workes really well :-) some mods on the arms but now it rapidly cools 5kg and clean sweep all the beans down the chute.
I'm working on the shroud now ( a crusty 44 gallon drum) (I'm purposefully making the cover "rustic" (I could make it super crispy & stainlesss if I wanted... I'm going for the rat rod look))

It is indeed a trailer hitch... If u pull on it the bean chute opens... One of my brothers has a forge so made two skull heads from hitch balls.... The other one is on the top on the dump handle on the roaster.....

Going to run some bulk kg's through it tomorrow and evaluate things..... 2.0 is happening :-)
broeker
Update :-)
broeker attached the following images:
image_108.jpg image_109.jpg
broeker
Hey guys.... So in my setup I've got both combustion/air & chaff going up the chimney as well as cooled air being sucked down through the cooling tray...(when in use)

My questions is..... How much chaff comes of the beans in the cooling tray? The reason I ask is I'm getting chaff coming out the chimney and am trying to decide if my cyclone isn't working (combustion side) or if I also need a cyclone on the cooling tray side....... What do u think?
allenb
I get a small amount of chaff through my cooling tray from each roast but it's not much. I guess after 10 or 20 roasts it could amount to a handful but I'm doing 1 lb roasts. Many commercial drum roasters run their cooling tray exhaust through the same cyclone as the drum exhaust to collect it all. Can you run both through your cyclone without major re-ducting?

To test your cyclone as it's set up now, place a piece of window screen downstream of it to see if anything is getting past it.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
Lawnmowerman
Broeker: the roaster where I buy most of my beans has just had installed, (thank you epa), a post -cooler cyclone. He has a 150 pounder I believe, but scale really doesn't matter, I think. If a big roaster let's some chaff past, it's to be expected that a smaller one would also, right? Ben.
Bad coffee prevails when good coffee roasters stand by and do nothing.
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