Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.

Shoutbox

You must login to post a message.

renatoa

04/17/2024 9:27 AM

, branchu

renatoa

04/14/2024 5:56 AM

TheOtherJim and papajim,

allenb

04/11/2024 6:33 PM

Zemona

renatoa

04/11/2024 9:19 AM

Mrbones and sgupta,

renatoa

04/10/2024 1:09 AM

, Ed K

Shoutbox Archive

Forum Threads

Newest Threads

War on Farmers by Su...
Kaleido Roaster PID ...
Green coffee sellers
Wet beans - Estimati...
Skywalker roaster mods

Hottest Threads

Skywalker roaster...	[292]
Skywalker, the AL...	[214]
Skywalker Roasts	[94]
My first popcorn ...	[47]
War on Farmers by...	[39]

In Memory Of Ginny

Donations

Latest Donations
dmccallum - 10.00
JackH - 25.00
snwcmpr - 10.00
Anonymous - 2.00
Anonymous - 5.00

Users Online

Guests Online: 2

Members Online: 0

Total Members: 8,208
Newest Member: branchu

Oh no! Where's the JavaScript?
Your Web browser does not have JavaScript enabled or does not support JavaScript. Please enable JavaScript on your Web browser to properly view this Web site,
or upgrade to a Web browser that does support JavaScript; Firefox, Safari, Opera, Chrome or a version of Internet Explorer newer then version 6.

View Thread

Homeroasters - Home Roasting Coffee Community » BUILDING A ROASTER » Turbo Oven Roasters

Who is here? 1 guest(s)

Page 1 of 2: 12

My new KKTO style roaster
JackH	#1 Posted on 08/08/2012 2:20 PM
Administrator Posts: 1809 Joined: May 10, 2011	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 6:12 PM


JackH	#2 Posted on 08/08/2012 2:25 PM
Administrator Posts: 1809 Joined: May 10, 2011	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:


JackH	#3 Posted on 08/08/2012 2:28 PM
Administrator Posts: 1809 Joined: May 10, 2011	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:


JackH	#4 Posted on 08/08/2012 2:30 PM
Administrator Posts: 1809 Joined: May 10, 2011	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:


JackH	#5 Posted on 08/08/2012 2:33 PM
Administrator Posts: 1809 Joined: May 10, 2011	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:


JackH	#6 Posted on 08/08/2012 2:39 PM
Administrator Posts: 1809 Joined: May 10, 2011	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:


oldgearhead	#7 Posted on 08/08/2012 2:51 PM
1 1/2 Pounder Posts: 1128 Joined: February 10, 2011	Very nice! No oil on my beans...


jedovaty	#8 Posted on 08/08/2012 3:59 PM
1/2 Pounder Posts: 225 Joined: October 31, 2011	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?


JackH	#9 Posted on 08/08/2012 4:58 PM
Administrator Posts: 1809 Joined: May 10, 2011	Quote 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://forum.home...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 5:08 PM


ginny	#10 Posted on 08/08/2012 5:34 PM
Founder Posts: 3476 Joined: October 24, 2005	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


JackH	#11 Posted on 08/08/2012 6:21 PM
Administrator Posts: 1809 Joined: May 10, 2011	Quote 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.


allenb	#12 Posted on 08/08/2012 9:17 PM
Administrator Posts: 3858 Joined: February 23, 2010	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


JackH	#13 Posted on 08/09/2012 8:28 AM
Administrator Posts: 1809 Joined: May 10, 2011	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.


JETROASTER	#14 Posted on 08/09/2012 8:54 AM
Administrator Posts: 1780 Joined: March 06, 2010	Wonderfully refined. Looking forward to seeing it on the banner! -Scott


Koffee Kosmo	#15 Posted on 08/09/2012 5:49 PM
Administrator Posts: 1620 Joined: December 31, 2008	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 I home roast and I like it. Designer of the KKTO Roaster Build information https://homeroast...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.
	Web

ginny	#16 Posted on 08/09/2012 6:11 PM
Founder Posts: 3476 Joined: October 24, 2005	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


JackH	#17 Posted on 08/09/2012 7:25 PM
Administrator Posts: 1809 Joined: May 10, 2011	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.


JackH	#18 Posted on 08/18/2012 12:04 PM
Administrator Posts: 1809 Joined: May 10, 2011	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: ---Jack KKTO Roaster.


JackH	#19 Posted on 08/18/2012 12:06 PM
Administrator Posts: 1809 Joined: May 10, 2011	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: ---Jack KKTO Roaster.


JackH	#20 Posted on 08/18/2012 12:16 PM
Administrator Posts: 1809 Joined: May 10, 2011	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: ---Jack KKTO Roaster.


Koffee Kosmo	#21 Posted on 08/18/2012 9:34 PM
Administrator Posts: 1620 Joined: December 31, 2008	That looks about right for the green bean weight you roasted I have observed over hundreds of roasts that with the KKTO design shorter OR longer roasting times don't seen to affect the end result The way it applies the heat for roasting beans differs from the norm Take note If using a standard Turbo Oven just plugged in to the outlet - that as the green beans roast weight increases so will the time to first crack unless you have great control of you applied heat Your Variac & Audrino will come into play Dont be afraid to have a large batch 800gr+ reach FC at 12/14 minutes and SC at 20/22 min You need top follow your own unique roast profiles that match this roaster Use other roaster profiles as a guide only and don't be shy to experiment The results in the cup will convince you that this is a unique roaster KK I home roast and I like it. Designer of the KKTO Roaster Build information https://homeroast...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.
	Web

jedovaty	#22 Posted on 08/18/2012 10:17 PM
1/2 Pounder Posts: 225 Joined: October 31, 2011	Coool, very nice again, Jack. Hey - did you know you can record the variac's output into your TC4's analog input? :) I'm not sure if roastlogger will then let you track this, but if it does, it'd be cool. I just did this having a variac controll fan speed, following a similar setup introduced to me by Jim and Allen: http://code.googl...onitor.jpg Well, it's nearly identical.. and the results (I'm really proud, project worked out and I didn't blow anything up or burn myself!):


JackH	#23 Posted on 08/19/2012 10:55 AM
Administrator Posts: 1809 Joined: May 10, 2011	Hi Jed, I did look into that circuit. The roastLogger does not have that feature to monitor and plot the voltage. Too bad a Kill-a-watt type device can't be modified to send it's wattage measurement data to the Arduino. That would probably be another major project. I'll have to open mine and see what is inside. --Jack ---Jack KKTO Roaster.


JackH	#24 Posted on 08/19/2012 10:57 AM
Administrator Posts: 1809 Joined: May 10, 2011	I increased the bean load to 650g and ran it today. the roast is longer, about 12 minutes with first crack at about 10 minutes. I usually don't do second crack. Don't like the taste. JackH attached the following image: ---Jack KKTO Roaster.


JackH	#25 Posted on 08/19/2012 11:02 AM
Administrator Posts: 1809 Joined: May 10, 2011	The results here stored in my new canister. Holds 16oz and is sealed with a valve on top. Made by Friis. Keeps the light and air out and the smell escapes out the top one way valve. JackH attached the following image: ---Jack KKTO Roaster.

Page 1 of 2: 12

Jump to Forum:

Similar Threads

Thread	Forum	Replies	Last Post
Kaleido Roaster PID parameters	Roasting Coffee	2	04/13/2024 3:07 PM
Skywalker roaster mods	Other Roasters	293	04/07/2024 4:31 PM
Skywalker, the ALM chinese one pound roaster	Other Roasters	215	04/02/2024 1:48 AM
My first popcorn mod roaster (vahegan)	Fluidbed Roaster	48	03/24/2024 12:04 PM
Fatamorgana electric drum roaster	Other Roasters	2	03/24/2024 10:03 AM