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CharcoalRoaster
11/04/2019 1:58 AM
+1 snwcmpr

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11/03/2019 2:16 AM
Can we make the shoutbox UNAVAILABLE until a member has a certain number of posts?

allenb
11/01/2019 2:20 AM
Funopt, please post in the gas and electric heat sources forum

Funopt
10/30/2019 5:17 AM
Can someone help me for using forced propane burner as my heating element. I rather want to use lpg than electric. Do you think it would work

snwcmpr
10/22/2019 5:31 AM
Thanks to you all....... I was not sleeping ... I stayed awake worried about it all. :)

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Honey Badger 1k
jkoll42
The new roaster should be complete this weekend so I thought I would get a thread started with the design parameters and vision behind the roaster. After thoroughly confusing myself in the last thread about what to call this thing, I have settled on the Honey Badger 1k. More on that to follow.

I wanted a roaster that was very easy to control, had a 1kilo +/- capacity and operated similar to my HG/BM as I have really had great roasts from it after dialing in the profile. I also wanted it to be easily moved and operate at any location. The final parameter was that the build should be able to be done without any specialized fabrication tools or techniques. No welding, commercial equipment, etc. Just tools that a typical handyperson might have.

The design is based around a steel frame, gear motor, 8qt stainless pot, and propane torch. Convection is provided by an axial fan inline with the torch. The torch assembly mates to the steel frame to keep things tidy but easily pulls apart for transport or storage. There are power outlets on the frame to power the fan and TC4 allowing only one plug to power the unit. Heat is through a sievert 2941 burner which should give enough heat for any ambient temp but also give extremely good low pressure performance. I plan on using my vac to suck the beans out of the chamber at the end of roast, but the unit is small and light enough to allow flipping and dumping the whole thing if I am not around a vac.

One of the cool features of this roaster is that it can be used without the need to hook up to mains for electric. The power draw for the entire setup is under 2A which allows it to be run off my car jump start battery pack that has an invertor. This allows for a roast to be performed literally anywhere with the roaster, portable propane tank and jump pack.

Back to the name. Most people have seen the Honey Badger video on youtube or somewhere else. One of the lines is something to the effect of 'honey badger don't care, it just does what it wants." That was at the heart of this design - hot temps, cold temps, at home, at a camp ground, in the middle of a field. Whatever, wherever I should be able to roast at any profile. I though it would be more fun that a bunch of acronyms :)

Pics and (good) flames to come this weekend (hopefully).


Jon
Edited by jkoll42 on 02/24/2012 4:07 AM
-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
jkoll42
First roast done today and for a first attempt on a new roaster things went really good. I had some strange temp readings for 1C (425F) so I think I need to check on TC placement but other than that all went well. One unexpected interesting thing is that the direct flame apparently incinerates the chaff - you could see mini chaff flame balls and there was none left at the end of roast. I had about a dozen charcoal beans so I have to work on the stirrer to eliminate what I assume is a dead zone in the center. All the rest of the beans were very evenly roasted. No tipping or scorching. The 2941 burner is was overkill on the BTU's but thankfully it still has a strong flame even with the Goss regulator pinned at nearly off.
-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
jkoll42
farm8.staticflickr.com/7055/6786356522_84c451ae7d_b.jpg

-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
jkoll42
farm8.staticflickr.com/7188/6932474331_a5080dacc9_b.jpg

-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
jkoll42
farm8.staticflickr.com/7060/6932474773_3b5ce6b76b_b.jpg

-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
jkoll42
farm8.staticflickr.com/7209/6932475221_44e71646b9_b.jpg


-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
jkoll42
farm8.staticflickr.com/7044/6932475699_6b3b581dc9_b.jpg

A little info about the torch setup. The actual head of the torch is even with the end of the copper tube. At the other end is a hacked together adapter and axial fan. The fan is used for both convection and to keep a fresh supply of air over the torch for a clean burn. It's adjustable for height, angle and direction.
-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
jkoll42
farm8.staticflickr.com/7064/6932476161_e9d03665e9_b.jpg

The drive shaft runs through a high temp brass bearing and the stirrer is attached to a triple height collar with tapped holes.
-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
Dan
Great work! Very nice machine. I have to throttle down my burner, too. I wonder if tilting the machine would prevent beans from gathering in the center?

 
http://www.intactamerica.org
JackH
Jon, you did a great job on the roaster. What speed is the stirrer motor running at?
 
jkoll42
It's running at 200RPM. I'm sure 150 would be good enough also. The end of the arm is really moving!

I may insulate the outside of the pot, but only if the roasts seem uneven
-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
allenb
I second the "great job" on this roaster! Beautiful workmanship.

A lot of stirring/agitation systems I've seen in the past utilized a spiral shape closest to the hub and then changed progressively more straight as it reached further out. This shape caused the product to continually migrate outward and not allow loitering.

If you're ever concerned that the chaff burning is causing a taint you could create an opening in the lid a couple of inches away from the burner pipe but close to the perimeter and attach a 2" 90 fitting with a screen can attached to it to hopefully catch the majority of the chaff before it has a chance to ignite.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
JackH
At that speed do you find the bean mass suspended above the bottom of the pot as Ed (Dreamroast) describes? the speed of the Dreamroast is the same I believe.
 
jkoll42
Allen - hopefully I don't find any taint. I have 1 day of previous beans left and Tuesday will give the first roast a try. It's the Rwanda so I've got a good expectation of what to ideally expect.

With the current configuration, the bulk of the bean mass runs from about 50% out from the center of the base to about 50% up the wall of the vessel. It thins to about the center of the vessel and when the beans are still green, a few make their way out the little gap in the cover. They have a strong and fast circular movement with agitation within. I imagine that it is a different bean movement than the dreamroast - less lofting and more slinging (?)

I will get a video up but might be a couple of days.

Also of note - the roast was done in 35F weather with a strong breeze so ambient temp seems to not be a problem.

Jon
Edited by jkoll42 on 02/26/2012 12:59 PM
-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
mk1
Very K.I.S.S. I really like it. Great work!

Roast Strong,
Mark
 
BenGeldreich
Absolutely gorgeous machine!! Great job on build and design. Bravo Sir!!
--------

Ben

Turbo Oven Roaster w/ Variac, TC4Cw/ Bourbon | Bezzera Strega | Baratza Vario Grinder | Yama 5 Cup Syphon | Aeropress
 
www.bengeldreich.com
lmclaren
Very nice,

Any problems with heat conduction back up to the fan assy?

 
jkoll42
Everything seemed fine with heat moving back to the fan. As a safeguard, where the copper meets the PVC assembly they never actually touch. The copper connector is held into the PVC with high temp silicone and has about 1/8" of just silicone. The thought was that this would act as a further thermal barrier. If the fan starts to droop off I will know there is a problem :)

There is also a silicone trivet under the vessel to isolate/insulate it from the main frame. It also acted as quite a nice sound dampener as well!
-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
 
seedlings
A+ :Clap:

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
JETROASTER
Nicely crafted. Bravo! -Scott
 
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