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11/26/2020 6:37 AM
Everyone have a super Thanksgiving and may all your roasts turn out stellar woohoo

11/25/2020 4:20 PM
Howdy 1st CH and welcome to HR forum! Be sure to read in the forums to see if anything covers the topic and please post away in drum roaster forums Welcome

11/25/2020 3:35 PM
Hey everyone! I am new to the home roasters forum. Mainly here to read and learn! I’d also love to get advice about modifying my roaster (a Huky 500)

11/10/2020 5:29 PM
Welcome MJ, post away! Cheers

11/08/2020 6:05 PM
Hello All, New here, started with an air popper, now using fresh roast 800. I'm here to learn and connect with others Thank you

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KKTO - My Humble Turbo Roaster
Wiz Kalita
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.
Koffee Kosmo
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://forum.homeroasters.org/forum/...ad_id=1142

https://docs.google.com/presentation/...lide=id.i0
Blog - http://koffeekosmo.blogspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
Koffee Kosmo
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://koffeekosmo.com.au/

Many Thanks
KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.homeroasters.org/forum/...ad_id=1142

https://docs.google.com/presentation/...lide=id.i0
Blog - http://koffeekosmo.blogspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
JackH
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.
renatoa
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...
Koffee Kosmo

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://forum.homeroasters.org/forum/...ad_id=1142

https://docs.google.com/presentation/...lide=id.i0
Blog - http://koffeekosmo.blogspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
JackH
That makes sense. Plus the safety concerns of removing the thermostat and other electrical modifications.
---Jack

KKTO Roaster.
Koffee Kosmo
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://forum.homeroasters.org/forum/...ad_id=1142

https://docs.google.com/presentation/...lide=id.i0
Blog - http://koffeekosmo.blogspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
renatoa
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.lelong.com.my/stainless-s...Sale-I.htm

... but searching for "dish warmer" you can find a lot of other layouts that could give you more ideas.
Koffee Kosmo

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.lelong.com.my/stainless-s...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://forum.homeroasters.org/forum/...ad_id=1142

https://docs.google.com/presentation/...lide=id.i0
Blog - http://koffeekosmo.blogspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
renatoa
It is 9.8 liters, so in your range of 9-12, if I remember well.
Koffee Kosmo

Quote

renatoa wrote:

It is 9.8 liters, so in your range of 9-12, if I remember well.


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://forum.homeroasters.org/forum/...ad_id=1142

https://docs.google.com/presentation/...lide=id.i0
Blog - http://koffeekosmo.blogspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
blumes
hi, is this ok for a new kkto?
https://www.ikea.com/it/it/p/stabil-c...-70238999/

or is this better?

https://www.amazon.it/Kr%C3%BCger-SPA...amp;sr=8-8

thanks
ciaooo
renatoa
I am using this steamer from Ikea in my actual workhorse machine:

https://www.ikea.com/it/it/p/stabil-c...-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.youtube.com/watch?v=6acgv...acgv5eyX0o

You have also the option to use this sieve:
https://www.ikea.com/ro/ro/p/ordning-...-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.
Koffee Kosmo

Quote

blumes wrote:

hi, is this ok for a new kkto?
https://www.ikea.com/it/it/p/stabil-c...-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.amazon.com/Quart-Stainles...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://forum.homeroasters.org/forum/...ad_id=1142

https://docs.google.com/presentation/...lide=id.i0
Blog - http://koffeekosmo.blogspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
mtbizzle
KK, have you ever seen a roaster like this?

https://www.youtube.com/watch?v=xsxtt...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: Nostalgia popper
Grind: Bunn G3, Comandante c40
Brew: aeropress, v60, la pavoni professional & flair espresso, Hoffmann french press, 'Scott Rao' water
Ask me about Tea!
Koffee Kosmo

Quote

mtbizzle wrote:

KK, have you ever seen a roaster like this?

https://www.youtube.com/watch?v=xsxtt...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

i.postimg.cc/qNnLbRsd/39318244-A6-EF-40-BE-839-E-1-C3864-E20580.jpg

KK
Koffee Kosmo attached the following image:
dd1ee8aa-9b05-47a6-897d-6ac16ce28b8d.jpeg

I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.homeroasters.org/forum/...ad_id=1142

https://docs.google.com/presentation/...lide=id.i0
Blog - http://koffeekosmo.blogspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
renatoa
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
JackH
Isn't tinkering what we do?
---Jack

KKTO Roaster.
Koffee Kosmo
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://forum.homeroasters.org/forum/...ad_id=1142

https://docs.google.com/presentation/...lide=id.i0
Blog - http://koffeekosmo.blogspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
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