topbanner.gif
Login
Username

Password




Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
Shoutbox
You must login to post a message.

05/08/2021 6:42 PM
Quidgybo Welcome! beach

05/08/2021 8:02 AM
Welcome, wcdyson !

05/02/2021 3:05 PM
Welcome espresoman

04/30/2021 2:53 PM
welcome to forum firroaster

04/27/2021 2:27 AM
JA Casey Welcome !

Community Spotlight
Brainiac
Join Date:July 27, 2007
Location:New Zealand
Posts Count:89
Rank:1/4 Pounder

Halogen Radiant Roaster
Hybrid Air Roaster
In Memory Of Ginny
Donations

Latest Donations
JackH - 25.00
snwcmpr - 10.00
Anonymous - 2.00
Anonymous - 5.00
Anonymous - 5.00
Users Online
Guests Online: 11

Members Online: 0

Total Members: 7,176
Newest Member: Adrian

View Thread

Who is here? 1 guest(s)
 Print Thread
Unusual Drum Roaster
allenb
Has anyone heard anything about the "Rotate Fun 300"roaster?

http://www.facebo...6858319474
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
allenb
Here's a video of it on youtube


Edited by allenb on 05/04/2013 7:54 PM
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
Koffee Kosmo
Thats a neat little roaster
Any info on capacity ?

KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...ad_id=1142

https://docs.goog...lide=id.i0
Blog - http://koffeekosm...gspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
Brainiac
Quote from Taiwanese roasters' forum...

"New play ~ ~ electric variable direct fire

Currently the amount is used only to baking 150g "

Koffee Kosmo

Quote

Brainiac wrote:
Quote from Taiwanese roasters' forum...

"New play ~ ~ electric variable direct fire

Currently the amount is used only to baking 150g "



To small an amount for me
150 gr less 20% shrinkage only leaves enough beans for a few cups of espresso

I will stick with the KK roaster that can roast from 300 gr to 800 gr of greens

KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...ad_id=1142

https://docs.goog...lide=id.i0
Blog - http://koffeekosm...gspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
allenb
I agree, even for a small roaster they should have gone for at least 8 oz.

It appears they've designed it around an auger/conveyor principle but I'm baffled how the beans can migrate out the one quadrant and re-enter just across from that point. Interesting design.

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

Quote

allenb wrote:
I agree, even for a small roaster they should have gone for at least 8 oz.

It appears they've designed it around an auger/conveyor principle but I'm baffled how the beans can migrate out the one quadrant and re-enter just across from that point. Interesting design.

Allen


They have a half moon cut out
the beans come out from the upper section then fall in the catch cup, the beans then migrate down to the lower part of the half moon cut out and fall back in the drum

The catch cup is removable and when it is removed the beans fall down to the cooler

Its call The Archimedes Screw

KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...ad_id=1142

https://docs.goog...lide=id.i0
Blog - http://koffeekosm...gspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
allenb
I think you pegged it.

I can't think of any other explanation as to it's conveyance. On the other hand, you would think that you would only see beans moving out of the upper quadrant of the half moon when the leading edge of the screw got to that location but I'm probably not visualizing it well enough.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
Brainiac
Another YouTube video - this plainly states 300g roast capacity. It also shows the screw agitator, which, combined with the slope of the (perforated) drum, explains the bean movement.
I wonder about having the beans spend so much time "outside" the roaster though...

http://www.youtub...re=related

Brian
allenb

Quote

Brainiac wrote:
Another YouTube video - this plainly states 300g roast capacity. It also shows the screw agitator, which, combined with the slope of the (perforated) drum, explains the bean movement.
I wonder about having the beans spend so much time "outside" the roaster though...
Brian


Alright then, we'll just have to redesign it.

Lets mount a nice 200 watt halogen with reflector just over the cup but leave enough room to get a spoon in there. No, don't need the spoon since we'll have such a good light.
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
allenb

Quote

Brainiac wrote:
Another YouTube video - this plainly states 300g roast capacity. It also shows the screw agitator, which, combined with the slope of the (perforated) drum, explains the bean movement.
I wonder about having the beans spend so much time "outside" the roaster though...
Brian


Brian,

In the video you posted it also looks like they are showing 100 to 500 g but I'm just picking out numbers since I can't read the Taiwanese text. I think you're right on the 300 grams with the 300 being in its name. You'd think with only 750 watts that anything over 250 grams would take a while to complete a roast.

I also saw the perf drum in the video and I agree with you that the movement has to be caused by just a simple helical sheet metal screw the more I look at the bean behavior.

As far as the beans spending time outside the roaster, please excuse me being a wise-guy on the last post. It's one of those things where you'd like to be able to do an A-B comparison with one roaster with beans traveling outside the roaster and another with them staying internal to see if there would really be a difference.

I unfortunately have this urge to get my hands on one of them to see how well it roasts but I'll keep slapping myself and just say no.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
Brainiac
Allen,
please don't apologise.

I always look at these things and think "if I had built this, how could I have done it different/better?" (99% of patents are awarded to (sometimes minor) improvements on "prior art").

Homeroasters is basically an ideas forum: we are all equal-opportunity borrowers. I would hate it if all the discussions were merely reviews of commercial equipment.

Brian
Edited by Brainiac on 06/19/2010 6:51 PM
allenb
I agree, if we were to review most of the equipment for home roasting we would probably be accused of being too critical.

Here's another view of the front.

At the very front is the drum's three bladed support hub and just behind it is the helical screw.
allenb attached the following image:
rotatefunhelical-vanes-1.jpg

Edited by allenb on 06/20/2010 8:19 PM
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
allenb
After Dan suggested the Archimedes screw in another thread http://forum.home...post_33801 post 19, I thought I'd resurrect this thread and post a recent photo showing the innards of this interesting roaster.

I'm still very interested in experimenting with this type of drum action (thanks to Dan!) especially with the unique ability to sample the roast level at a glance.



Allen
allenb attached the following image:
1-rotatefun_1.jpg

1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
Dan
I played around with an auger action. I got one of those augers you put in an electric drill to drill holes in the ground to plant bulb or fertilze trees. They are about 2" in diameter and 16" long. It has potential, but it had difficulty lifting the beans straight up since the beans are essentially ball bearings! I can see why they ended up using it tilted, which is how an Archimedes Pump works, too. Check out this WikiPedia page for more inspiration:

http://en.wikiped...#39;_screw
allenb
I'm guessing they used a "fast spiral" pitch. Possibly only making a 360 degree travel from front edge of flight to rear of drum which would have more lifting ability although not to the point of lofting the beans into a trajectory leaving the mass like a conventional drum roaster. By only going one circular travel from front to rear you would have the following action:

By the time the front leading edge of the flight rotated past the 10 o-clock position and consequently shoved coffee into the front cup, the right side (narrower part of front opening) would allow the coffee to free fall back down a ways into the drum unimpeded. I'm also thinking the reason for the front opening narrowing on the right side is to not have an equal incoming and outgoing resistance to bean flow which would allow a larger amount to accumulate in the cup then would otherwise be with an equal size opening across the mouth.

Allen
Edited by allenb on 02/10/2012 3:38 PM
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
John Despres
Looks like a 20 minute roast. Or more.

Redesigning it is a great idea!

John
Respect the bean.
John Despres
Fresh Roast 8, Gene Cafe, JYTT 1k, Quest M3, Mazzer Mini, Technivorm, various size presses and many more brewers.
Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
Infrared grill machine as coffee roaster (commercial) Other Roasters 1 05/09/2021 10:17 AM
Royal Peanut Roaster Drum Roaster (Store Bought and Commercial) 2 05/05/2021 12:15 PM
Cyclops - my 1kg drum build Drum Roasters 58 04/28/2021 3:07 AM
My first roaster ever - a very cheap fluid bed Fluidbed Roaster 9 04/24/2021 8:43 AM
Heat, smoke and chaff - fluid vs. drum Roasting Coffee 7 04/22/2021 5:40 PM
Homeroasters Association Logo, and all Content, Images, and Icons © 2005-2016 Homeroasters Association - Logos are the property of their respective owners.
Powered by PHP-Fusion Copyright © 2021 PHP-Fusion Inc
Released as free software without warranties under GNU Affero GPL v3
Designed with by NetriX