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snwcmpr
10/22/2019 5:31 AM
Thanks to you all....... I was not sleeping ... I stayed awake worried about it all. :)

Koffee Kosmo
10/21/2019 5:00 PM
While you were sleeping I have been active in booting out some spammers along with the posts they tried to sneak past me

NetriX
10/21/2019 2:41 PM
Apologies, fixed it asap! BBQ grill

snwcmpr
10/21/2019 12:35 PM
WOW!! A few minutes ago the site page said "Account Suspended". And would not open the site.

snwcmpr
10/18/2019 2:37 PM
Eth Nat Yirg Idido roasted yesterday. I dropped some off at a friends coffee shop. In a few days he will brew it and tell me what he thinks. We believe my roasts are better than what we buy.

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My KKTO BUILD...
Pretzal
Hi,

After my recent introduction about a month ago I have decided to go ahead and build a KKTO roaster. I was initially a little hesitant about the concept as I wasn't too enamored with the home-made style roaster concept. However after quite a bit of investigation, I finally decided to give it a go. Very happy so far I did.
Firstly I would like to put out a HUGE thank you to Koffee Kosmo - he has provided a LARGE amount of offline help including phone calls, emails (LOTS!) and texts that have been instrumental in making it happen. He has also provided many of the parts required and has been very reasonable with costs - mostly just covering his expenses. It truly is a special person who gives so much without expecting anything in return - Koffee Kosmo is one of those people. So a big thank you!

So with that it mind - on with the build!

Initially I investigated getting KK to make one for me, but I felt I would be missing out on a lot of fun and satisfaction of doing it myself. Very happy with my decision and have enjoyed the process immensely. Fortunately I was able to source the recommended Arcosteel pots from eBay without too much trouble. Other items sourced from there were the 240cm pizza tray (for the false bottom), thermocouple, 10m roll of fibreglass exhaust wrap (for external insulation) and multimeter/datalogger. The wooden chopping board was sourced locally (Big W) and a few bits an pieces from Bunnings (hardware shop). The motor, false bottom insulation, agitator, drive shaft, wiring loom and silicon sealing were provided by Koffee Kosmo.

The dremel, step drill, file, gasket maker and various other tools were required. Nothing is overly complex and can be completed with a little attention to detail.

Below is a couple of photos during construction, the thermocouple and photos of the first and second roast plus also the bean cooler I made.

Pretty impressed so far. It's going to take a little bit of experimentation and getting to know the roaster but the first 2 roasts have been fairly solid. I'm also very happy with the bean cooler - it means I don't have to tip the hot roaster to eject the beans and cools them down to a 'touchable' temperature in less than 30 seconds.
Pretzal attached the following images:
roaster_1_4.jpg roaster_2_3.jpg roaster_3_3.jpg roaster_4_3.jpg roaster_5_1.jpg roaster_6_1.jpg roaster_7_1.jpg roaster_8_1.jpg
 
JackH
It looks great! Nice to see another KKTO roaster build.
KK (paul) was a tremendous help to me during my build and many modifications. It is great to have him here.

I see you are using the wire wisks for stirring. I added them to my roaster last year and it is working very well.

It is looking great and you have some nice roasted beans there.
---Jack

KKTO Roaster.
 
MikeW
That's very nicely thought out and tidy. You mentioned you don't have to tip the hot roaster to get the beans out, how does that work? Are you vacuuming them out?

Great work.
 
Koffee Kosmo
Excellent work and a couple of excellent looking maiden roasts ThumbsUp

My roaster has roasted it's butt off on 2000 + roasts and still going strong
So you will have a long and productive life ahead of you on your roaster

Happy Roasting
KK
I home roast and I like it
Blog - http://koffeekosm...gspot.com/
Bezzera Strega: Mazzer Robur Grinder: 5 Box hand grinders: Pullman Tamper Convex: (KKTO) Turbo Oven Home Roaster: CONA Glass Rod Syphon: Pyrex Brewer:
 
http://koffeekosmo.com.au
Pretzal
Yes Mike I'm using a cheap wet and dry vacuum I bought. You can see the black vacuum hose attached to the base of the bucket. I went to the hardware store and bought the grey 1 metre pool hose then some plumbing fittings that would mate with the hoses. I ensured the fittings had lips on them so they would be easy to attach and retain in the bucket. Have to say I'm really chuffed with the results - it functions perfectly.

As far as the roaster goes, the 2 roasts I've done so far have been 600grams with a 200 degree Celsius preheat. First crack about 11.30 and second crack 14.45 ish. The insulation seems to be doing its job pretty well as I can touch the outside and keep my hands there for a little bit during the roast.
 
Barrie
Very nice indeed, Pretzal. I use a different roasting device, but have made various attempts to jerry-rig a cooling/chaff-removal arrangement like yours. I have a similar colander and bucket setup, but have yet to come across a colander with just the right-sized holes that permit good chaff egress, especially the larger pieces, while not letting the beans through. I am coming around to thinking about drilling to enlarge them. Have you (or anyone else) solved that hole-size issue?

If you wouldn't mind telling us, what did this cost you, other than in terms of your own time and tools?
Barrie (San Diego, CA)
"So much to learn, so little time."
Hottop 2K+., Artisan, Jura Capresso ENA 3 (i.e. espresso).
 
Pretzal
I'm sure the build could be done a lot cheaper than what I did it for depending on what parts could be sourced cheaply. I prioritised aesthetics and function over cost so what I spent is not indicative of what would be an average. All up roaster an cooler I spent about $500 but everything was new except for the power supply which I recycled from a battery charger. The bean cooler could be done quite cheaply. I bought the vacuum cleaner new ($47), the bucket was $8 and the fittings/hoses about $20. The colander was part of the pot set which was $47 including $20 delivery. To be honest the bean cooler doesn't handle that much chaff, I'm pretty amazed at how well the roaster retains almost all of the chaff which collects on top of the false bottom (under the perforated pasta insert). I notice some have cut small vertical slits in the pasta insert to draw away extra chaff but as yet I haven't felt the need to. The photo above shows the chaff remaining in the roaster.

I can measure the holes on the colander if you like and I am happy to further breakdown the costs I spent on the roaster if that would be of benefit to you or anyone else.
 
Barrie
Thanks for the info, Pretzal.
Barrie (San Diego, CA)
"So much to learn, so little time."
Hottop 2K+., Artisan, Jura Capresso ENA 3 (i.e. espresso).
 
Koffee Kosmo
Now that the beans have rested / degassed can you please post some taste impressions of your roasts

KK
I home roast and I like it
Blog - http://koffeekosm...gspot.com/
Bezzera Strega: Mazzer Robur Grinder: 5 Box hand grinders: Pullman Tamper Convex: (KKTO) Turbo Oven Home Roaster: CONA Glass Rod Syphon: Pyrex Brewer:
 
http://koffeekosmo.com.au
Pretzal
Sure can KK,

The first roast, although it looked ok in the photos was well into rolling 2 crack and had a small handful of beans that was a little past good drinking. I removed those beans but the rest had a hint of ash in the cup and the beans themselves when split open were a little charred. So I will chalk than one up to experience. It is difficult to know exactly how long it will take one's own roaster as all of them are unique in their build and insulation properties, not to mention humidity and temperature variables on the day.

The second roast was I obviously intended to roast for less time, however they were different beans (I like to vary the beans I drink and didn't want to have one particular type for too long). These beans were roasted just into second crack (I think as I'm still discerning the sounds of the roaster). The result visually was much better. There were no toasted beans and internally the beans looked fairly evenly roasted. There was a particular note that I don't quite love between roast #1 and roast #2 but I can't quite isolate exactly what it is. I can hypothesise that it may be one of a few causes ( KK might be able to shed some light here):

1. The both had the same preheat temperature of 200 degrees Celsius which may be too high.
2. The roaster is still being seasoned?
3. Both roasts still may have been taken too far into 2nd crack for my palates liking and have taken on the roast flavour.

I think we are still getting to know each other that's for sure. Roast #2 is still very drinkable, but I reckon there is some room for improvement in the way I roast using it. The datalogger should arrive soon so I will most likely wait for that to arrive before roasting again as it will provide more guidance and a little bit of extra science to the process.
 
Koffee Kosmo
That's not uncommon and it happens to both professional or home roasters when new machinery is introduced

Consider yourself on L plates at the beginning and after a few roasts under your belt you will archive better results ThumbsUp

KK
I home roast and I like it
Blog - http://koffeekosm...gspot.com/
Bezzera Strega: Mazzer Robur Grinder: 5 Box hand grinders: Pullman Tamper Convex: (KKTO) Turbo Oven Home Roaster: CONA Glass Rod Syphon: Pyrex Brewer:
 
http://koffeekosmo.com.au
Barrie
Koffee Kosmo wrote:

Consider yourself on L plates at the beginning and after a few roasts under your belt you will archive better results ThumbsUp

KK

Great comment, KK, except that we do not have L (learner) plates on cars in the US. That is not to say that it wouldn't be a good idea. Grin
For those not familiar with that scene in the UK and down under, one has to put "L plates" (big red L on white background) on any car being driven by someone yet to get a license ("drivers ed" stage).
Barrie (San Diego, CA)
"So much to learn, so little time."
Hottop 2K+., Artisan, Jura Capresso ENA 3 (i.e. espresso).
 
Koffee Kosmo
Barrie wrote:
Great comment, KK, except that we do not have L (learner) plates on cars in the US. That is not to say that it wouldn't be a good idea. Grin
For those not familiar with that scene in the UK and down under, one has to put "L plates" (big red L on white background) on any car being driven by someone yet to get a license ("drivers ed" stage).


Its a good idea for sure Barrie
So are you considering a KKTO build Barrie ? we need a few more members in the owners group

KK
I home roast and I like it
Blog - http://koffeekosm...gspot.com/
Bezzera Strega: Mazzer Robur Grinder: 5 Box hand grinders: Pullman Tamper Convex: (KKTO) Turbo Oven Home Roaster: CONA Glass Rod Syphon: Pyrex Brewer:
 
http://koffeekosmo.com.au
Erichimedes
Pretzal, that looks like a great build! Keep us updated on your roasts and how they come out. I'm in the process of building a turbo oven roaster, so this is great to see!

One question I have, is that you seem to be using the same blue tubing (?) for sealing the pots to eachother and the turbo. What is this blue stuff that everybody seems to be using, and where can I find it?
 
JackH
This is the tubing I used for my build:

http://www.usplas...;catid=799

Silicon tubing good to 500F. I cut a slit length wise and fit the pot rim.

The size I used is 3/8" ID x 1/2" OD and it fits my outer pot rim. There are many sizes available.
---Jack

KKTO Roaster.
 
Koffee Kosmo
JackH wrote:

This is the tubing I used for my build:

http://www.usplas...;catid=799

Silicon tubing good to 500F. I cut a slit length wise and fit the pot rim.

The size I used is 3/8" ID x 1/2" OD and it fits my outer pot rim. There are many sizes available.


On my builds that utilise the 2 pot system I use the larger size on the rim where the Turbo Oven contacts, and a smaller hose in the pot to pot connection point

One can see that in the photos for reference
KK
I home roast and I like it
Blog - http://koffeekosm...gspot.com/
Bezzera Strega: Mazzer Robur Grinder: 5 Box hand grinders: Pullman Tamper Convex: (KKTO) Turbo Oven Home Roaster: CONA Glass Rod Syphon: Pyrex Brewer:
 
http://koffeekosmo.com.au
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mkane
I 'm going to start collecting parts for a build like this.
Always learning
 
Koffee Kosmo
mkane wrote:

I 'm going to start collecting parts for a build like this.


If you have any questions
Just post on any relevant thread
Myself and any builder/owners will help out

KK
I home roast and I like it
Blog - http://koffeekosm...gspot.com/
Bezzera Strega: Mazzer Robur Grinder: 5 Box hand grinders: Pullman Tamper Convex: (KKTO) Turbo Oven Home Roaster: CONA Glass Rod Syphon: Pyrex Brewer:
 
http://koffeekosmo.com.au
mkane
Thank you very much.
Always learning
 
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