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My new KKTO style roaster
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| JackH |
Posted on 08/08/2012 12:20
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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I have been working on this for a while and it is finally done! Here is a photo of the setup outside where the light is better.
JackH attached the following image:
Edited by ginny on 08/09/2012 16:12
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| JackH |
Posted on 08/08/2012 12:25
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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I used a large diameter outer pot and a aluminum cake pan as an inner pot.
There is insulation between the inner and outer on the sides and bottom.
The roast chamber is a pasta strainer and I added a solid bottom because I found the bottom holes were rough and acting like a bean grater.
I am also using an official KKTO agitator blade and shaft assembly.
JackH attached the following image:
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| JackH |
Posted on 08/08/2012 12:28
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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I built in the control panel with the TC-4/Arduino logger with all connectors available from the front. The control panel is self contained and removable for use in other roasters.
JackH attached the following image:
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| JackH |
Posted on 08/08/2012 12:30
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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Here is a view of the side with one of the two 120mm fans I added to keep the inside cool.
JackH attached the following image:
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| JackH |
Posted on 08/08/2012 12:33
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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I traded an old laptop I fixed for this Variac made by superior electric. It is rated to 25 Amps. I added the box, fuseholder and outlet with AC meter.
I really don't need 25A but it is good to have a heavy duty unit.
JackH attached the following image:
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| JackH |
Posted on 08/08/2012 12:39
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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Thanks to Paul (Koffee Kosmo) for all his help and advice. The KKTO agitator works very well and with this roast chamber I can go to about 600g.
The roast chamber is removable and I can make a larger one if needed. 450g meets my needs.
My roasts on the original Stir crazy were about 15-16 minutes. With this setup I finish in about 11-12 minutes. It really holds the heat in. The outer pot does still get hot, but not too bad.
JackH attached the following image:
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| oldgearhead |
Posted on 08/08/2012 12:51
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Pounder Plus
Posts: 481
Joined: 02/10/2011 15:16
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Very nice!
"Development of flavor, aroma, and body in the coffee bean is a chemical process which requires absorption of a definite number of heat units per pound of coffee-in the shortest possible time and the lowest possible temperature." - Sivetz
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| jedovaty |
Posted on 08/08/2012 13:59
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Posts: 213
Joined: 10/31/2011 03:33
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That looks really sweet! I don't know if you recall, tried something similar but not as elegant. I used an old speaker cabinet. Worked for a bit.
I see you have the BT and ET there, how are they secured? How do you get the beans out, tip the whole contraption, or pull the colander out? |
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| JackH |
Posted on 08/08/2012 14:58
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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jedovaty wrote:
That looks really sweet! I don't know if you recall, tried something similar but not as elegant. I used an old speaker cabinet. Worked for a bit.
I see you have the BT and ET there, how are they secured? How do you get the beans out, tip the whole contraption, or pull the colander out?
Thanks Jedovaty and Oldgearhead!
I have the thermocouples inserted into what once was a stainless steel probe. Just cut the end of the steel probe, pulled the old wire out and inserted my probe into it. Just using it as a holder. I just drilled out holes in the pot and they slide in.
I vac out the beans direct into my cooler. There is a thread on this cooler here. http://www.homero...rowstart=0
This will monitor the roast standalone or attached to a computer to graph. I am using the RoastLogger software.
Some of the work looks rough and a bit tilted, I am not a wood or metal worker. Much of it was done with hand tools.
Edited by JackH on 08/08/2012 15:08
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| ginny |
Posted on 08/08/2012 15:34
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Super Admin
OWNER
Posts: 2762
Joined: 10/24/2005 11:33
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Jack:
sweet setup, nice work.
thanks for showing it off. now take a picture and send it to John Despres for his
banner making...
you gotta show it off.
ginny
Ala di Vittoria La Valentina,
Solis 5K, Aero Press, Mazzer Mini, Hot Top 8828 B 2K,
Quest 3, TC4C set up to use...
Sun-swept beaches with a light wind blowing...
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| JackH |
Posted on 08/08/2012 16:21
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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ginny wrote:
Jack:
sweet setup, nice work.
thanks for showing it off. now take a picture and send it to John Despres for his
banner making...
you gotta show it off.
ginny
Thanks Ginny,
Sent a PM to John. |
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| allenb |
Posted on 08/08/2012 19:17
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Super Admin
Fix It Man
Posts: 1473
Joined: 02/23/2010 19:51
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Very nice roaster! + 1 on all the positive comments above.
Let us know how the roasts cup.
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 08/09/2012 06:28
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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I have done several roasts so far. I am finding that the faster roasts do not need to sit for days after roasting. 24 hours and it is drinkable. Faster, but still under control. |
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| freshbeans |
Posted on 08/09/2012 06:54
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Super Admin
Reasonable
Posts: 1400
Joined: 03/06/2010 11:10
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Wonderfully refined. Looking forward to seeing it on the banner! -Scott |
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| Koffee Kosmo |
Posted on 08/09/2012 15:49
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Super Admin
Posts: 1046
Joined: 12/31/2008 06:49
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Very nice job Jack
The design is so flexible for a DIY roaster to play around the edges so to speak
You need to post some roasted bean photos soon 
As a side note I have spoken to a few early adopter KKTO owners recently
All official kit units are still working
Most have done several hundred roasts
One entered a bean roasting comp for professional roasters and was 1/2 a point off a placing
So (based on the above) it looks like you will have a great relationship with your roaster
KK
My web site > koffeekosmo.com.au I home roast and I like it :P
Blog - http://koffeekosm...gspot.com/
Bezzera BZ40:Bezzera Strega: BNZ MD74 Grinder: 6 Box hand grinders: Pullman Tamper Convex: (KKTO) Turbo Oven Home Roaster: CONA Glass Rod Syphon: Pyrex Brewer: |
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| ginny |
Posted on 08/09/2012 16:11
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Super Admin
OWNER
Posts: 2762
Joined: 10/24/2005 11:33
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Hi guys:
I look at this post and I simply must smile; this is what we are all about here
on HRO.
we have each shared and taken knowledge from one another and look what happens...
a member creates their own version of a great roaster.
we rule the homeroaster venue.
ginny
Ala di Vittoria La Valentina,
Solis 5K, Aero Press, Mazzer Mini, Hot Top 8828 B 2K,
Quest 3, TC4C set up to use...
Sun-swept beaches with a light wind blowing...
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| JackH |
Posted on 08/09/2012 17:25
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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KK, Thanks again for the help. I have your seal of approval...KKTO is a time tested design. I will take some roast photos soon. I never think of doing that. |
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| JackH |
Posted on 08/18/2012 10:04
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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I roast in my garage and built this enclosure to move some of the smoke away. It uses a 6 inch fan and duct work going outside to a window vent.
JackH attached the following images:
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| JackH |
Posted on 08/18/2012 10:06
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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The big Variac is mounted on the side out of the way. I use a Kill-a-Watt to monitor current to the heater.
JackH attached the following image:
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| JackH |
Posted on 08/18/2012 10:16
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1/2 Pounder
Posts: 255
Joined: 05/10/2011 17:14
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Here is a roast log for Honduras beans I did recently. The roast length is much shorter now 10 - 11 minutes. I also notice that I no longer have to wait 3 days to drink, 24 hours will do now. We will see how all this holds up in the winter. Great results so far no sour or baked flavors.
450g load. I did not go to second crack.
JackH attached the following image:
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thanks for joining.
for you