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Page 1 of 2: 12
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 Minni KKTO
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| Coffee makes the world goround |
Posted on 12/14/2010 6:24 AM
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 Newbie  Posts: 49 Joined: December 12, 2010 |
Hi i am new here , im from Denmark , so English is not my first language , but i hope it does well enough i have roasted with a popper , that was later modded Then i did see a SCTO and thought ,nice ,,but one could do better then i did see the KKTO again nice , but was not sure that ,that was what i wanted I would like something in the 250 gram area and smaller size Then i did see a minni turbo Owen on ebay , and bought it Well then i had to build a minni KKTO but i wanted it to be even simpler so here is parts of my build I had a inner pot made of stainless , it was thin walled ca, 0,8 mm no way you could make a counter sunk hole for a countersunk screw or could one :)
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 6:26 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
I made this tool its just some scrap metal with a counter sunk hole , calculated to make the bulge i wanted to made fit the screw a amboss with a hole in it + a screw to hammer into the hole
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 6:28 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
Then you put in the screw through the inner pot and through the tool and into the amboss hammer it until the countersunk has formed
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 6:29 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
Without the screw that was used as a tool
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 6:38 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
This is the inner pot in the outer pot what you can not see is the small spacers i made they are just some 16 mm stainless roundbar drilled 6mm and countersunk this makes a gap under the inner pot of 14 mm In one KK posts you see him explain that the hot air will go down the sides of the inner pot and then up through the beens via the perforated bottom nice theory , i totaly did agree i did just wonder that he then did use a inner pot with perforated sides ?? no way the air would go up through the beens ,if it could take the easier way through the sides ?? so i thought ,,mine will have solid sides , i can always later perforate them if needed in this photo the bottom is still not drilled
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 6:41 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
So i had to make a bushing for the axle its just brass then the center hole that i in the start had at 6mm to align things was opened up to fit the bushing
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 6:41 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
Hey i did fit
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 6:42 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
Keep it simple
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 6:42 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
inside ,,nit even countersunk , not needed
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 6:44 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
Well sins i did not want ti make this a hand turned one , i had to fit a windscreen wiper motor , it from BMW ,only turns 30 pr minute
Edited by Coffee makes the world goround on 12/14/2010 6:45 AM |
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| Coffee makes the world goround |
Posted on 12/14/2010 6:46 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
ups |
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| Coffee makes the world goround |
Posted on 12/14/2010 6:48 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
Is there a limit for how many pictures i can post ?? can not get more fixed to my posts
Coffee makes the world goround attached the following image:
Edited by Coffee makes the world goround on 12/14/2010 6:54 AM |
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| Coffee makes the world goround |
Posted on 12/14/2010 6:59 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
I made this bracket , its just flat iron clamped to a steel plate and tack welded let to cool (still clamped )and ground the welds down turned around clamp again and full weld ,grind down welds . let coll turn around again clamp again and full weld , grind , let coll this way you wont get any warping
Coffee makes the world goround attached the following image:
Edited by Coffee makes the world goround on 12/14/2010 7:07 AM |
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| Coffee makes the world goround |
Posted on 12/14/2010 7:16 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
So the screws goes through the inner pot spacers and the outer pot the nuts holding it together , is in this picture replaced by the legs they are just some 16 mm stainless round bar drilled and tapped M6 in both ends then at the bracket some hex M6 bolts are holding the bracket
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 7:16 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
fiddling with the motor
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 7:19 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
In the last photo you can se the last part of the leg its again the same 16 mm stainless round bar this time drilled 6 mm at one end and almost through 12 from the other end this makes it possible the put the hex screw into the leg and holding everything together
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 7:24 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
Lots of drilling in the inner pot DONT make them that big it gave me problems with the stirrer the holes did catch the beens , and sins the pot is so thin , it bend and that was not so good i had to make the stirrer so that it was a whole been hight above the bottom of the inner pot (a been could pas under the stirrer) it didnt seem so good , but i get nice even roasts anyway
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 7:27 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
this is a photo from AFTER my firsts test runs the theory about the air going under and up through the beens ,, didnt work , so i did put a ""few" slits into the pot i wonder how some have problems with chaff in there beens ,,i newer have any ,,wonder why ;)
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 7:28 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
so how does it look here it is on top of my stow , and under my exhaust fan on low it makes almost no noise (the fan ) good for hearing first crack
Coffee makes the world goround attached the following image:
Edited by Coffee makes the world goround on 12/14/2010 7:30 AM |
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| Ringo |
Posted on 12/14/2010 7:30 AM
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 Pounder  Posts: 474 Joined: January 14, 2010 |
Wow very nice, Thats the first BMW roaster I have see. I looks like a great roaster.
All you need in life is ignorance and confidence, and then success is sure. Mark Twain
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| Coffee makes the world goround |
Posted on 12/14/2010 7:30 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
So,, how minni is the minni B)
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 7:31 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
I think this better shows it
Coffee makes the world goround attached the following image:
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| Coffee makes the world goround |
Posted on 12/14/2010 7:49 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
Here is a roast i did i really think it is best to separate the heater ,and use a dimmer/triak at the end of the roast , just when you need it most , you loose the control the beens are heated by air , but also by radiation at the end you have very little radiation , because the oven is hot , and the element dont cycle so much have any done this this roast was done by preheating to 150 on the dial , but the air was 200 then doumb the beens by 140 been temp minutes i set the heat to 225 and just before 1C at 187 i set it a bit lower and that the problem, then the element stays of for to long
Coffee makes the world goround attached the following image:
Edited by Coffee makes the world goround on 12/14/2010 7:51 AM |
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| Coffee makes the world goround |
Posted on 12/14/2010 7:59 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
I think there is a BIG difference in how to roast with this beast , compared to the popper so any have experience with both i roast lots of different beens I have many times heard 5 min to dry 150 c 3 min to 1c and then 3,5 to 4,5 for drip 4,5 to 5 for espresso but its hard to make this beast go fast from 150 it senses the air temp ,not the beens i have seen the tube mod but that would actually make the element cycle lees (stable air temp =no need for the element to be on) have any tried the opposite making the gap bigger then the element has to work harder to hold/get the air temp up the air temp is high enough , only the air can not heat the been s fast enough but the radiation could |
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| Coffee makes the world goround |
Posted on 12/14/2010 8:20 AM
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Newbie Posts: 49 Joined: December 12, 2010 |
This Is a Malawi Pamwamba African been again 150 on the dial (air 200) then at 2 minutes bump to 225 at 185 30sec before 1c set to 213 again the heater plays tricks as the temp inside rises the cycling rate drops i want it to be constant just like you could keep the gas flame on constant
Coffee makes the world goround attached the following image:
Edited by Coffee makes the world goround on 12/14/2010 8:24 AM |
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Page 1 of 2: 12
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