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 KKTO - My Humble Turbo Roaster
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| Wiz Kalita |
Posted on 02/27/2019 8:44 AM
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 Newbie  Posts: 49 Joined: August 06, 2018 |
I was going to handle that by suspending the inner chamber using slotted L-brackets, but getting some extra space from the ring is very practical. |
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| Koffee Kosmo |
Posted on 03/04/2019 4:27 PM
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 Administrator  Posts: 1620 Joined: December 31, 2008 |
Total roast chamber volume You need to add the curvature of the Turbo Oven in the calculations I encourage you keep as close as possible to the design principles and make small design enhancements if your skill set is capable of doing so Any design can be enhanced but one needs the tools and the skill to do so Keep us in the loop with drawings and photos 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. |
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| Koffee Kosmo |
Posted on 07/17/2019 5:14 AM
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Administrator Posts: 1620 Joined: December 31, 2008 |
A quick notice for the KKTO roaster I have had many many emails asking for me to make available a fully manufactured and assembled roaster To that end I am willing to start production of the new KKTO if I have orders of 100 units This number keeps the cost down If interested - follow the link for design update information and take the survey and register your interest http://koffeekosm... Many Thanks 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. |
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| JackH |
Posted on 07/17/2019 2:40 PM
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 Administrator Posts: 1809 Joined: May 10, 2011 |
It would be great to see you back with the KKTO, Mr Kosmo! Will you still be using a converted turbo oven to drive it? ---Jack
KKTO Roaster. |
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| renatoa |
Posted on 07/17/2019 3:16 PM
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Administrator Posts: 2728 Joined: September 30, 2016 |
Reading from the page linked above: Quote To keep the unit costs to a minimum the Turbo Oven won't be included ... so I think this means he is using a regular lid... |
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| Koffee Kosmo |
Posted on 07/17/2019 5:13 PM
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Administrator Posts: 1620 Joined: December 31, 2008 |
Quote JackH wrote: It would be great to see you back with the KKTO, Mr Kosmo! Will you still be using a converted turbo oven to drive it? Yes a regular Turbo Oven will still be used as a heat source However should you choose to do so one can use a heat gun For American enthusiasts- the voltage is different - so it makes sense to purchase that component locally 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. |
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| JackH |
Posted on 07/18/2019 2:43 AM
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Administrator Posts: 1809 Joined: May 10, 2011 |
That makes sense. Plus the safety concerns of removing the thermostat and other electrical modifications.
---Jack
KKTO Roaster. |
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| Koffee Kosmo |
Posted on 07/18/2019 7:39 AM
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Administrator Posts: 1620 Joined: December 31, 2008 |
The project will only go ahead if the required order numbers reach 100 units I will personally assemble and test all the roasters myself to keep costs down The original design is now 10 + years old and going strong So you can be assured that the product will be engineered for long life 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. |
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| renatoa |
Posted on 08/08/2019 9:58 AM
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Administrator Posts: 2728 Joined: September 30, 2016 |
Walking today in a food facility I seen a tool that spark my imagination... what a great starting hardware for a turbo oven roaster ! All you need is to find an appropriate sieve/pasta strainer and start building. The device I seen looks identical to this, all dimensions: https://www.lelon...Sale-I.htm ... but searching for "dish warmer" you can find a lot of other layouts that could give you more ideas. |
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| Koffee Kosmo |
Posted on 08/09/2019 1:29 AM
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Administrator Posts: 1620 Joined: December 31, 2008 |
Quote renatoa wrote: Walking today in a food facility I seen a tool that spark my imagination... what a great starting hardware for a turbo oven roaster ! All you need is to find an appropriate sieve/pasta strainer and start building. The device I seen looks identical to this, all dimensions: https://www.lelon...Sale-I.htm ... but searching for "dish warmer" you can find a lot of other layouts that could give you more ideas. That pot set idea has promise As always one needs to stick to the volume parameters I have set down for best results 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. |
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| renatoa |
Posted on 08/09/2019 2:21 AM
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Administrator Posts: 2728 Joined: September 30, 2016 |
It is 9.8 liters, so in your range of 9-12, if I remember well. |
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| Koffee Kosmo |
Posted on 08/09/2019 6:00 AM
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Administrator Posts: 1620 Joined: December 31, 2008 |
Quote The actual overall volume range including the base pot & Turbo Oven dome is 7 to 9 lt - So 8 lt is ideal 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. |
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| blumes |
Posted on 05/23/2020 10:26 AM
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Newbie Posts: 5 Joined: November 28, 2014 |
hi, is this ok for a new kkto? https://www.ikea....-70238999/ or is this better? https://www.amazo...amp;sr=8-8 thanks ciaooo |
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| renatoa |
Posted on 05/23/2020 11:19 AM
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Administrator Posts: 2728 Joined: September 30, 2016 |
I am using this steamer from Ikea in my actual workhorse machine: https://www.ikea....-30152346/ ... but mine is not a 100% KK design, rather something closer to a SCTO, my oven being flatter, and using the whole 32 cm lid size/area. You can see here in action, at the end of the cooling phase: https://www.youtu...acgv5eyX0o You have also the option to use this sieve: https://www.ikea....-90011829/ ... that could allow for a better agitation if matched with a higher speed motor, like those from a bread machine, in the 200 RPM ballpark. This way you could mimic a centrifugal roaster, the high speed would throw the beans laterally on the walls, and the curved bottom will help them to come back to the center by gravitation. |
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| Koffee Kosmo |
Posted on 05/24/2020 12:40 AM
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Administrator Posts: 1620 Joined: December 31, 2008 |
Quote blumes wrote: hi, is this ok for a new kkto? https://www.ikea....-70238999/ or is this better? https://www.amazon.it/Kr%C3%BCger-SPA-Pentola-spaghetti-acciaio/dp/B00GHDLYKY thanks ciaooo I tend to favour this pot set https://www.amazo...eyHM8D3FEo KK Edited by JackH on 05/24/2020 3:05 PM 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. |
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| mtbizzle |
Posted on 06/04/2020 11:36 PM
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1/4 Pounder  Posts: 101 Joined: April 22, 2020 |
KK, have you ever seen a roaster like this? https://www.youtu...sxttg2N6P4 It is a 14cm diameter x 18cm long drum that I believe holds 1#. It reminds me of your build -- TO on an insulated pot with an agitation mechanism. I'm curious what you think of the possibility of putting such a drum with a motor into something like your build. Roast: Kaldi wide, SR800 + projects
Grind: Lab sweet, Bentwood, giota w/ MP burrs, Commandante Pull: Decent, La Pavoni, Elektra Microcasa a Leva, Faemina anno 60, Kim Express |
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| Koffee Kosmo |
Posted on 06/05/2020 3:53 AM
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Administrator Posts: 1620 Joined: December 31, 2008 |
Quote mtbizzle wrote: KK, have you ever seen a roaster like this? https://www.youtu...sxttg2N6P4 It is a 14cm diameter x 18cm long drum that I believe holds 1#. It reminds me of your build -- TO on an insulated pot with an agitation mechanism. I'm curious what you think of the possibility of putting such a drum with a motor into something like your build. Yes my friend that lives in the next suburb and I have built a drum KKTO about 8 years ago He is also a mechanical engineer- and he still uses it to this day I originally built a hybrid KKTO that uses two heat sources for him TO on top Electric fry pan under but he wanted a drum roaster version So we just built one - but it?s not a build for a novice Be aware that he and I have posted about the drum roaster on other forums or social media - and I have posted drawings of many different versions Including a twin TO drum roaster going back 10 years This photo is the proof  KK
Koffee Kosmo attached the following image:
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. |
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| renatoa |
Posted on 06/05/2020 4:14 AM
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Administrator Posts: 2728 Joined: September 30, 2016 |
Been there, did that, forget it. Not able to roast even 330g satisfactory, the pot is too big, you need 14 litres at least to accommodate that drum, too much volume, not enough heat, but my insulation wasn't so elaborate as in the video. Used exactly same basket as in the video. KK picture shows a much smaller drum and "square" than in the video, just compare with the heater plate diameter, which is 18 cm. Probably the oven was been smaller accordingly. Thought that agitation wasn't enough, so tinkered a diagonal paddle, Gene style, no benefit, still hard to have FC near minute 12 with 330 grams. 250g is where I should stop, at least for my pickiness. Plus, charging and drop is very difficult to do with from mesh basket, I mean handling when hot. My setup included a hot air probe, routed inside through one of the (hollow) shafts of the basket. ET inside basket wasn't ever bigger than 230 C, when the lid thermostat was been set to 250 C, which explains the lack of load capabilities. The basket indeed might hold one pound, volume is 2.77 litres, compared to Gene 1.5 litres (16x11 cm), but the issue is temperature... Gene blows hot air at 300 C, from a 900 Watt heater, in a much smaller volume. Maybe if you can build some inner walls in the pot, to reduce volume just to the space needed for basket, this way could work. But, as KK wrote, too much tinkering compared to a KKTO or SCTO build, that roast one pound happily in right time. Edited by renatoa on 06/05/2020 4:22 AM |
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| JackH |
Posted on 06/05/2020 4:28 AM
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Administrator Posts: 1809 Joined: May 10, 2011 |
Isn't tinkering what we do?
---Jack
KKTO Roaster. |
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| Koffee Kosmo |
Posted on 06/05/2020 4:36 AM
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Administrator Posts: 1620 Joined: December 31, 2008 |
I should have mentioned that we can roast up to 1 KG in that KK Drum roaster - as it uses the same components and the specified volume I have set down as the original roaster Anyone can tinker with mechanical characteristics but not the volume that needs to be strictly adhered to And also the agitation needs an action that mixes and rolls the beans - not just to be pushed around in circles 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. |
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