DIY roaster design

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DIY roaster design

Postby Skippy » Sun Apr 27, 2008 6:01 pm

Theres a downloadable PDF with coffee articles from MAKE magazine (http://makezine.com) featuring amongst other things, a coffee roaster. It seems like quite a good design and reasonably easy to build but what do you guys think of it? Could it roast coffee to a decent standard?

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RE: DIY roaster design

Postby Neo » Sun Apr 27, 2008 6:18 pm

I am gonna build one in late may or june.
well that's not what i wish to build. Not only that i want to use another heating method ,ie semi, but i think this design is gonna be inconsistent in terms of temperature and end products.
it can give nice results i believe, but to fine tune will be a pain in the @$$.
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RE: DIY roaster design

Postby Chrisweaver » Sun Apr 27, 2008 8:05 pm

ha haa, we will get our roasters built Neo!!!

I wanna see your plans and see what its going to be like to build a semi heat roaster!!
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RE: DIY roaster design

Postby Neo » Sun Apr 27, 2008 9:25 pm

later chris...I'm having exams, cant even spare enough time to watch movies :D
i have a draft in my mind but there are a lot of technical and numerical data to be confirmed/planned.
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RE: DIY roaster design

Postby Skippy » Sun Apr 27, 2008 9:40 pm

Are there any tried and tested diy roaster plans out there? I know theres been loads built but they all seem to be pretty different from each other.
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RE: DIY roaster design

Postby Skippy » Sun Apr 27, 2008 9:52 pm

can certainly see what you mean about fine tuning that roaster thinking about it more neo. Not sure how consistent the temperature is from a cheap camping gas stove either?
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RE: DIY roaster design

Postby Neo » Mon Apr 28, 2008 1:28 am

Personally i am not worried about the gas stove. I think as long as the LPG flow rate remains the same, the heat given out should be the same.
It doesnt matter that much, I'm gonna pid my machine anyway.
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RE: DIY roaster design

Postby Beanie » Mon Apr 28, 2008 4:41 am

Just a few thoughts from looking at the pic only:
- the flame looks awfully close to the 'open' drum - flames touching beans? good, bad, indifferent?
- as an 'open' system, I guess it's an outdoor roaster? (chaff here, chaff there, chaff everywhere)
- you also have to have some sort of rapid bean cooling thingamajig
- with the flame 'right there' where would you put the thermometer to read bean temps? Will the proximity to the flame affect 'true' readings?
- apart from chaff everywhere, how about 'flaming' chaff flying about all over? and of course, the ash that will land everywhere as well?
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RE: DIY roaster design

Postby Neo » Mon Apr 28, 2008 5:05 am

I tried to use a small pot to roast and i loved watching chaffs burning :D
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Postby Chrisweaver » Mon Apr 28, 2008 7:44 am

The roaster I've been looking at is based on the Ugly Roast, whereby its simply a perforated drum, on an axle, inside a second drum to support it, with a camping stove sat under it. It's also going to be hinged, with an open end using a funnel so I can dump them really easily!! I'm planning to just use a motor from a fan to turn the drum, and have it set up so I can adjust the speed of the drum to fine tune it!

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Postby dsc » Tue Apr 29, 2008 12:33 pm

Hi,

if you want ideas, type "crazy stir roaster" or something similar in google. That's what I would like to build sometime soon:)

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Postby farmroast » Wed Apr 30, 2008 2:35 am

dsc wrote:Hi,

if you want ideas, type "crazy stir roaster" or something similar in google. That's what I would like to build sometime soon:)

Cheers,
dsc.
Stir crazy type roasters are a great design.
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Postby Neo » Wed Apr 30, 2008 5:30 am

What's that machine, centrifuge?
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Postby zix » Wed Apr 30, 2008 10:26 pm

For more roaster ideas, do have a look at the homeroasters.org forum.
Several different designs there, easy/complex, ugly/good looking, big/small... I am going to try building one of them anytime this century. A really smart roaster if you ask me, the NZ "halogen roaster".
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