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Homeroasters - Home Roasting Coffee Community » BUILDING A ROASTER » Turbo Oven Roasters

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Page 3 of 3: 1 23

KKTO Build
Gullygossner	#51 Posted on 03/22/2020 7:34 PM
1/4 Pounder Posts: 95 Joined: January 06, 2019	Quote mkane wrote: One more thing, I need to wrap the outer drum. If nothing else to keep from getting burnt. I've been using a cotton towel with no issues but others have used fibreglass fire blankets. I think my final insulation will end up being felt but the towel will do the trick until I source that. Creative agitator design! Much like the production units.


mkane	#52 Posted on 03/23/2020 5:30 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	That agitator seems to work very well. Did another roast today. Warmed the machine 10 minutes or so, ET 410? f . DE @ 4;05, 1C 7:45. Trying to roast darker for my wife. Campfire like. Beans look real evenly roasted. Always learning


mkane	#53 Posted on 03/23/2020 5:35 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	. mkane attached the following image: Always learning


Koffee Kosmo	#54 Posted on 03/24/2020 1:07 AM
Administrator Posts: 1620 Joined: December 31, 2008	It will take some time and many roasts under your belt to gain experience with the roaster before you can call yourself a fully fledged home roaster Good work on the build so far now start roasting 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	#55 Posted on 03/24/2020 6:44 AM
1/4 Pounder Posts: 151 Joined: October 23, 2017	Woke up thinking about a way to measure BT. I can't think of a way. Is there one? Although from my scouring topics on coffee roasting ET is just as important, no? Always learning


renatoa	#56 Posted on 03/24/2020 7:38 AM
Administrator Posts: 2666 Joined: September 30, 2016	Do you already measure BT ? How? I mean where is the sensor placed ... I seen the Fluke meter in pics, but not the probe location. ET is important, I mean VERY important, when you have a setup not allowing a precise BT measurement. Like Gene roaster for example. That's why I ask the above. Also, does your meter features any communication/connections, or internal temperature logging ? If not, and you plan reading visually, and write down by hand the time/temp, then there is no more precision requirements. Maybe you can improve this using the roastlogger OCR feature, i.e. aim meter display with a camera and record optical recognised values (page 11 of manual). In a TO the most accurate ET measurement is right in the center of the oven. How you place a probe there is one of the many ways to skin a cat.


Koffee Kosmo	#57 Posted on 03/24/2020 8:08 AM
Administrator Posts: 1620 Joined: December 31, 2008	The easiest of my designs to fit a probe into the bean mass of the KKTO roaster is - Over the perforated pots top lip and in between the join of the silicone tubing The reason it works is that it sits just inside the side wall and the agitator blade when properly bent is positioned 1/2 ? from the side wall So the probe sits in this void but inside the bean mass Similar to this 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	#58 Posted on 03/24/2020 8:22 AM
1/4 Pounder Posts: 151 Joined: October 23, 2017	Thanks for the pic's Paul. Guess I'l put some more bend in the agitator blade. renatoa, the TC's in use for the time being is just floating in mid air, measuring ET. No BT probe, yet. The plan is to use Artisan software to track profiles. Always learning


renatoa	#59 Posted on 03/24/2020 10:00 AM
Administrator Posts: 2666 Joined: September 30, 2016	Tried the position above and get beans stuck between probe and the wall, that finally bent the probe. So mine is placed as in the picture attached. ... renatoa attached the following image:


renatoa	#60 Posted on 03/24/2020 10:06 AM
Administrator Posts: 2666 Joined: September 30, 2016	Back to your ET question. I would try first to see if I can get good BT readings, i.e. values smooth enough to not give headaches when looking at RoR curve... then think to ET as the next step. If having a good BT reading, then ET is just for safety, not mandatory to judge a good roast.


mkane	#61 Posted on 03/24/2020 12:43 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	Thanks. I might just try a bit fat probe and see if it stays straight. Always learning


mkane	#62 Posted on 03/24/2020 7:16 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	I have the TC wires shoved into a DMM. Don't know how accurate this could be. Charged @ 400? TP 45 sec 177? 3:50 300? 4:38 320? 5:12 350? 6:00 370? 1C 8min 395? I dropped roast @ 10:20-430?. My wife likes it dark. Always learning


mkane	#63 Posted on 03/24/2020 7:17 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	Keep forgetting mkane attached the following images: Always learning


mkane	#64 Posted on 03/31/2020 8:43 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	This arrived as did the tubing. https://www.ebay....2569538620 much for instructions , does this need 220v AC to operate? My silicone held up to the heat BTW. Happy camper. Edited by JackH on 04/01/2020 7:06 AM Always learning


Koffee Kosmo	#65 Posted on 03/31/2020 10:16 PM
Administrator Posts: 1620 Joined: December 31, 2008	Quote mkane wrote: This arrived as did the tubing. https://www.ebay.com/itm/4000W-AC-220V-SCR-Voltage-Regulator-Motor-Speed-Control-Semiconductor-Silic/202569538620No much for instructions , does this need 220v AC to operate? My silicone held up to the heat BTW. Happy camper. Good to see that you are enjoying coffee roasting This info from the specs How to Use: 1.The input is connected with the AC 220V. 2.Output wire is connected to the electric cooker or appliance motor. 3.Turn the knob for speed, voltage, temperature control. However it may work on 110V as the Voltage regulation range starts at 10V But someone with more electrical knowledge can answer that better than me 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

renatoa	#66 Posted on 04/01/2020 1:58 AM
Administrator Posts: 2666 Joined: September 30, 2016	Actually this is "push the buttons" version, instead "turn the knob". Much easier to reproduce roasts, with knob you can't return to a position with 1% precision, which is 5 C degrees in ET, not negligible. I would start with empty oven, to find the power value that raise temperature to 270 C, the red line you shouldn't cross. Also, 175-200 C is an useful range to mark, for the preheat. During this tuning you will find also the temperature step for a button push, worth to note. At the end you will find the range you are playing for the roast is not that large as expected, probably some 10-15 steps, in the 60-70 values ballpark, so is for the lids I tested so far.


mkane	#67 Posted on 04/01/2020 6:48 AM
1/4 Pounder Posts: 151 Joined: October 23, 2017	Thanks you two. I'll try start with our socket current which is 117v just to be safe. Always learning


mkane	#68 Posted on 04/01/2020 5:27 PM
1/4 Pounder Posts: 151 Joined: October 23, 2017	It actually works. mkane attached the following image: Always learning


renatoa	#69 Posted on 04/02/2020 4:05 AM
Administrator Posts: 2666 Joined: September 30, 2016	How else... ? Not sure what I read there... 280 degrees at 60% ? C or F ?


mkane	#70 Posted on 04/02/2020 8:04 AM
1/4 Pounder Posts: 151 Joined: October 23, 2017	F. I'll dicker with it some more today. Not real pleased with the TC placement. Seems to get banged up where it's at. Beans get stuck behind it. It's also in and out of the beans as the agitator goes round and round. Don't know what the solution for that is. More beans, maybe? Agitator tweeking, possibly. Always learning


renatoa	#71 Posted on 04/02/2020 8:10 AM
Administrator Posts: 2666 Joined: September 30, 2016	Did you noticed the picture with my probe placement ?


mkane	#72 Posted on 04/02/2020 8:16 AM
1/4 Pounder Posts: 151 Joined: October 23, 2017	Yes I did. I'll do some experimentation today. Always learning

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