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

03/23/2023 10:31 AM

Welcome, bob22 and hu

allenb

03/22/2023 8:52 AM

Thanks skpacman! all help with our site is much appreciated!

skpacman

03/20/2023 8:57 PM

Added some code to combat against bots. If anyone has issues with it, let me know. ❤

renatoa

03/19/2023 4:55 AM

frankvanhaarlem, fenix and Andyleighmyers

renatoa

03/16/2023 2:51 AM

@sandpiper,

Shoutbox Archive

Forum Threads

Newest Threads

Roast Color Nerdy Stuff
Fluid Bed Roaster Ca...
CafeMasy SCR-300 Roast
Heating elements
Espresso maker under...

Hottest Threads

Roast Color Nerdy...	[57]
Espresso maker un...	[30]
CafeMasy SCR-300 ...	[21]
2 series heat gun...	[21]
Bellwether Roaster	[21]

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: 6

Members Online: 0

Total Members: 7,830
Newest Member: bob22

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 3: 12 3

KKTO Build
mkane	#21 Posted on 03/12/2020 1:30 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	By reconnecting the thermostat ( which is already done) and using a TC. Heck I can't even control the roast on my 1lb. drum roaster. Always learning


renatoa	#22 Posted on 03/12/2020 2:48 PM
Administrator Posts: 2497 Joined: September 30, 2016	TC ? TC4 board ? ThermoCouple, to measure temperature ?


mkane	#23 Posted on 03/12/2020 9:15 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	TC to measure temp using a simple Fluke meter. Don't know if it will be BT or ET. Always learning


renatoa	#24 Posted on 03/13/2020 3:04 AM
Administrator Posts: 2497 Joined: September 30, 2016	Gooood... So no electronics/computer, nothing bad about this, I was there and not disappointed, the results are same class as an Artisan roast. What would be my steps in this scenario: - adjust thermostat shifting the temperature scale, to be able to cycle at 250C, if not already there... - mount the diode that ensure the continuous smooth temperature increase without huge swing due to on-off switching, or... - mount a $12 power variator, for perfect profiling experience without compromise. www.ebay.com/itm/...2569538620


mkane	#25 Posted on 03/13/2020 9:37 AM
1/4 Pounder Posts: 151 Joined: October 23, 2017	What type of diode? 1/2 w. 1 w 5 w? I have plenty on hand. I'll look at the variator. Pairing the TO with Artisan is a possibly. We now use Artisan with a drum roaster. Edited by mkane on 03/13/2020 9:43 AM Always learning


mkane	#26 Posted on 03/13/2020 9:40 AM
1/4 Pounder Posts: 151 Joined: October 23, 2017	Took a look. I have a SUT I can use with this. Might be an inexpensive experiment. Edited by mkane on 03/13/2020 4:49 PM Always learning


renatoa	#27 Posted on 03/13/2020 10:59 AM
Administrator Posts: 2497 Joined: September 30, 2016	Quote mkane wrote: What type of diode? 1/2 w. 1 w 5 w? I have plenty on hand. I'll look at the variator. Pairing the TO with Artisan is a possibly. We now use Artisan with a drum roaster. Double current than your heater, and 1.4x the voltage of the mains. For an 1300W 230V lid, which means 6 Amps current draw, I would go with a minimum of 12 amps 400V diode, but for 5 cents more I am more safe with 16 Amps 600V The diode and SCR solutions are exclusive, you should decide which of them. Edited by renatoa on 03/14/2020 1:54 AM


mkane	#28 Posted on 03/13/2020 4:57 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	Think I'll go with the SCR Always learning


mkane	#29 Posted on 03/18/2020 7:55 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	Double Boiler arrived today. I drilled the 4 mm holes in the inner pot, got the bearings installed, cut a false floor using the lid and mounted that also. Tomorrow I'll tinker with the agitator. mkane attached the following image: Always learning


mkane	#30 Posted on 03/18/2020 7:59 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	..... mkane attached the following image: Always learning


Koffee Kosmo	#31 Posted on 03/18/2020 8:25 PM
Administrator Posts: 1611 Joined: December 31, 2008	Does the insert have any holes ? 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

mkane	#32 Posted on 03/19/2020 10:35 AM
1/4 Pounder Posts: 151 Joined: October 23, 2017	It does. I drilled them myself. If it needs more, I'll drill em'. 4 mm mkane attached the following image: Edited by mkane on 03/19/2020 10:40 AM Always learning


Koffee Kosmo	#33 Posted on 03/19/2020 5:12 PM
Administrator Posts: 1611 Joined: December 31, 2008	You can put thin slits on the sides if it?s easier 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

mkane	#34 Posted on 03/19/2020 7:49 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	I've got holes in the sides also. There spaced out more that on the bottom. Are these hole just for chaff removal? I also got the agitator working. Not sure if it's the best but I suppose a roast will tell the whole store. Seems to work best with 350 grams of beans. I'm going to work on another agitator like the fancy unit you designed while holed up here at home. The first agitator doesn't get down low enough with 200 grams of beans. With 350 is looks like it mixes well. Edited by mkane on 03/19/2020 7:58 PM Always learning


Koffee Kosmo	#35 Posted on 03/19/2020 7:59 PM
Administrator Posts: 1611 Joined: December 31, 2008	Quote mkane wrote: I've got holes in the sides also. There spaced out more that on the bottom. Are these hole just for chaff removal? I also got the agitator working. Not sure if it's the best but i suppose a roast will tell the whole store. Seems to work best with 350 grams of beans The holes have dual purpose Heat circulation and chaff removal You will see the chaff spinning above the the agitating beans and you can judge where the holes should go from observing Agitation is important It must mix the beans like rolling stones- constantly on the move, not just a mass of beans pushed around and around to achieve a great roast Have a look at some of my videos with the red bean test and copy the results with your setup 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

mkane	#36 Posted on 03/19/2020 8:05 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	for some reason my pics won't load Always learning


JackH	#37 Posted on 03/20/2020 3:21 AM
Administrator Posts: 1809 Joined: May 10, 2011	Quote mkane wrote: for some reason my pics won't load Keep your file name simple, no special characters of spaces. Don't use preview post or reply, for some reason it disables the attached photo. Keep your image file small. I use resize in MS paint and scale down to 800X600 or so. No need to have 4000X3800 for web viewing. Loading images to test: JackH attached the following images: ---Jack KKTO Roaster.


renatoa	#38 Posted on 03/20/2020 4:32 AM
Administrator Posts: 2497 Joined: September 30, 2016	The chaff is not exhausted from the roasting insert by the bottom holes, conversely, the air is sucked by the turbine in a vertical column, from the bottom. The bottom holes are required mainly to ensure a good airflow in the beans bed. Having a different approach than original KK design, by using a wider and lower insert, that allows using the whole glass area of the lid, I can observe better how is the chaff flow in such oven. After absorbed and ejected radially by the lid turbine, the chaff path is a descending spiral along the walls to the bottom of the pot.


mkane	#39 Posted on 03/20/2020 10:28 AM
1/4 Pounder Posts: 151 Joined: October 23, 2017	............. mkane attached the following images: Always learning


Koffee Kosmo	#40 Posted on 03/20/2020 7:44 PM
Administrator Posts: 1611 Joined: December 31, 2008	I will give you the physical engineering explanation behind the chaff removal in a KKTO design Please note that appropriately 90% of chaff is removed to the lower chamber Chaff spins along the side wall of the perforated pot and above the agitating beans during the early part of the roast Some smaller chaff exits via the holes on the sides via fan forces Note - Beans roasting expand in volume size x 3 fold or more While the bean volume increases the chaff is folded into the agitating bean mass and ground down into smaller pieces The chaff now smaller works itself to the lower area and exit via the lower sides and bottom of the perforated insert Note - Slits with a raised gill ( like shark gills ) on the side wall will catch and remove a good percentage of the early circulating chaff But that is an design idea for a fully manufactured 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

mkane	#41 Posted on 03/21/2020 11:07 AM
1/4 Pounder Posts: 151 Joined: October 23, 2017	I may try that Paul. Slits with a dremel, then some other type of tool to raise an edge. Which direction should the raised edge face? Always learning


JackH	#42 Posted on 03/21/2020 11:50 AM
Administrator Posts: 1809 Joined: May 10, 2011	A tip I found about the hard way: When you make cuts in the roasting chamber, be sure to smooth out the holes with sanding. I found that the drilled holes with sharp edges acted like a cheese grater, slicing/damaging the beans as they spin around. ---Jack KKTO Roaster.


renatoa	#43 Posted on 03/21/2020 12:25 PM
Administrator Posts: 2497 Joined: September 30, 2016	Quote mkane wrote: I may try that Paul. Slits with a dremel, then some other type of tool to raise an edge. Which direction should the raised edge face? In the direction of the vortex spiral. If not ever done a roast, so rotation unknown, then drop some hay/dried grass inside the pot, and start the lid at lowest temperature. Will see the grass drying, then raised by the airflow, thrown outside the pot and spinning along the wall. For my lid the vortex spinning direction is CCW, so the opening for chaff collecting (cyclone exhaust) has the orientation according to this rotation direction.


mkane	#44 Posted on 03/21/2020 4:10 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	I need to work on the agitator as the roast isn't real even. I also wasn't prepared to get the beans cool fast enough. But, there's plenty of heat. mkane attached the following images: Always learning


mkane	#45 Posted on 03/21/2020 4:14 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	1C was 9:15. 350g. I still need to source some silicone tubing. Always learning

Page 1 of 3: 12 3

Jump to Forum:

Similar Threads

Thread	Forum	Replies	Last Post
What's the best electric fluidbed build running on 110V?	Fluidbed Roaster	3	03/07/2023 7:17 AM
1-6 lbs Roaster Build - Nothing Fancy	Drum Roasters	28	02/18/2023 9:52 AM
Gas Fired Drum Roaster - Lets Build It	Drum Roasters	48	12/23/2022 11:07 AM
These are the specifications of the roasting machine that took a year to build	Building a Coffee Roaster	27	12/07/2022 11:24 AM
Hi from rainy Bolton-Fluidbed Build	Fluidbed Roaster	18	09/05/2022 6:51 PM