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Homeroasters - Home Roasting Coffee Community » BUILDING A ROASTER » Drum Roasters

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Brilliant guy from Malaysia's 800 gr. build
pixelsmithy	#1 Posted on 12/26/2017 1:39 PM
Newbie Posts: 28 Joined: October 14, 2016	On Facebook, a guy from Malaysia (ChingThye Gan) posted this video: It uses an Ikea colander for the roasting drum and in the video I believe he is roasting 800 grams of green beans. I'm really impressed with this design. I took some screenshots of the video and marked them up with questions, labels, and guesses, which you can see HERE: https://imgur.com... These screenshots focus on the build of the roaster itself (while the video is focused on the laptop screen/Artisan for a good chunk of the time. I'd like this thread to discuss some possible improvements and also sourcing parts for this design. I'll get things started. I like a LOT about this build, but there are a few problems: 1) The galvanized bucket for the roasting chamber has to be a No-No (danger of zinc fumes). 2) sucking out the hot exhaust gases into the chaff collector/exhaust could be improved upon by allowing the mixing of ambient air to cool the exhaust before it gets to the chaff collector. 3) the exhaust/chimney path could be improved with fewer bends and always going upward (rather than downward) 4) since the blower on the chaff collector/exhaust system is PULLING air from the roast chamber, the temp in the roast chamber is going to be the result of the combination between the gas burner (in) and the speed/volume of the exhaust air draw (out). This is not a problem, but some tweaking of those settings will probably be necessary. I believe the chaff collector blower (120V) could be wired to a dimmer switch for adjustability. 5) if you use a brush gear motor, you can get a higher RPM than necessary and dial it down with a router speed controller (or similar) to your desired RPM. Shown in the video. 6) He does not use high temp bearings, but I believe that I would. Using a 1/2" stainless steel threaded rod for the drum shaft, I found some high temp flange bearings with a 1/2" bore for $19 ea. I think that is a worthwhile investment. I'm hoping to build this before spring (moving to a new house in January, so can only accumulate parts between now and then). I'm hoping to get to a 2 lb. roasting capacity. Thoughts on any/all of the above? Additional points?


pixelsmithy	#2 Posted on 12/26/2017 1:53 PM
Newbie Posts: 28 Joined: October 14, 2016	Forgot one other thing. would like to figure out how to make a trier and incorporate that into the design.


renatoa	#3 Posted on 12/27/2017 2:08 AM
Administrator Posts: 2497 Joined: September 30, 2016	He has a thread on his own, check for Ikea in titles, or the new/active threads from last week. He is using a dimmer for chaff exhaust, check at 00:44.


pixelsmithy	#4 Posted on 12/27/2017 3:16 PM
Newbie Posts: 28 Joined: October 14, 2016	Oh, good. I'll see if I can find it. This board has the worst navigation options I have ever seen.


snwcmpr	#5 Posted on 12/27/2017 3:55 PM
1 1/2 Pounder Posts: 925 Joined: March 03, 2011	Ikea inspired roaster build. https://forum.hom...ad_id=5462 -------------- Backwoods Roaster "I wish I could taste as well as I wish I could roast." As Abraham Lincoln said "Do not trust everything you read on the internet".


JackH	#6 Posted on 12/30/2017 3:00 PM
Administrator Posts: 1809 Joined: May 10, 2011	Quote pixelsmithy wrote: This board has the worst navigation options I have ever seen. There is Search and the Active Forums page under Navigation on the left side of the main page. ---Jack KKTO Roaster.


Koffee Kosmo	#7 Posted on 12/30/2017 7:23 PM
Administrator Posts: 1611 Joined: December 31, 2008	Quote pixelsmithy wrote: Oh, good. I'll see if I can find it. This board has the worst navigation options I have ever seen. The moderators have debated at length and have come up with a brilliant FORUM INDEX section Due to the many ways Coffee is 1) Grown and processed 2) Roasting methods used - be it commercial or DIY 3) Brewing styles & methods - and there are many more than people think 4) Roasters inventive or otherwise submitted by members So I urge members to visit the Forum Index first and locate the best section of interest first 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	#8 Posted on 12/31/2017 3:52 AM
Administrator Posts: 2497 Joined: September 30, 2016	Don't worry guys, both hints I gave him were enough to led him to the other thread in some clicks... - search Ikea in titles only, is that really a challenge ? - looking into Active Forums page... the thread can be seen there in a blink even now after one week, checked as I type... - third method, found as typing this message, Newest Threads section, left side of every page... Ikea still can be seen there.

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