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Honey Badger 1k
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| jkoll42 |
Posted on 02/24/2012 09:02
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Pounder Plus
Posts: 530
Joined: 02/14/2011 08:25
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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 09:07
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| jkoll42 |
Posted on 02/26/2012 12:49
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Pounder Plus
Posts: 530
Joined: 02/14/2011 08:25
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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.
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| jkoll42 |
Posted on 02/26/2012 12:50
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Posts: 530
Joined: 02/14/2011 08:25
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Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| jkoll42 |
Posted on 02/26/2012 12:50
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Pounder Plus
Posts: 530
Joined: 02/14/2011 08:25
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Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| jkoll42 |
Posted on 02/26/2012 12:50
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Pounder Plus
Posts: 530
Joined: 02/14/2011 08:25
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Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| jkoll42 |
Posted on 02/26/2012 12:51
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Pounder Plus
Posts: 530
Joined: 02/14/2011 08:25
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Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| jkoll42 |
Posted on 02/26/2012 12:53
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Posts: 530
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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.
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| jkoll42 |
Posted on 02/26/2012 12:55
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The drive shaft runs through a high temp brass bearing and the stirrer is attached to a triple height collar with tapped holes.
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| Dan |
Posted on 02/26/2012 14:45
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Founder - Member
Posts: 1803
Joined: 10/24/2005 17:09
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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?
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| JackH |
Posted on 02/26/2012 16:04
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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Jon, you did a great job on the roaster. What speed is the stirrer motor running at? |
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| jkoll42 |
Posted on 02/26/2012 16:37
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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
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| allenb |
Posted on 02/26/2012 16:48
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Super Admin
Fix It Man
Posts: 1480
Joined: 02/23/2010 19:51
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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
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| JackH |
Posted on 02/26/2012 16:52
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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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. |
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| jkoll42 |
Posted on 02/26/2012 17:57
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Joined: 02/14/2011 08:25
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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 17:59
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| mk1 |
Posted on 02/26/2012 20:13
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1/4 Pounder
Posts: 87
Joined: 11/14/2011 18:11
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Very K.I.S.S. I really like it. Great work!
Roast Strong,
Mark |
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| BenGeldreich |
Posted on 02/26/2012 20:47
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1/4 Pounder
Posts: 76
Joined: 01/20/2011 22:40
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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
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| lmclaren |
Posted on 02/27/2012 00:46
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1/4 Pounder
Posts: 156
Joined: 03/19/2011 22:17
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Very nice,
Any problems with heat conduction back up to the fan assy?
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| jkoll42 |
Posted on 02/27/2012 03:30
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Pounder Plus
Posts: 530
Joined: 02/14/2011 08:25
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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!
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3
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| seedlings |
Posted on 02/27/2012 08:14
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Administrator EMERITUS
Posts: 4295
Joined: 06/27/2007 11:39
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A+ :Clap:
CHAD
Don't put the cart before the horse. Put the horse in the cart and listen to him say "weeeee" all the way down the hill.
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| freshbeans |
Posted on 02/27/2012 09:37
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Super Admin
Reasonable
Posts: 1400
Joined: 03/06/2010 11:10
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Nicely crafted. Bravo! -Scott |
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thanks for joining.
Marco.....