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JavaBob
09/16/2019 4:03 PM
Has anyone used a Leister hot air blower to roast coffee and if so, which model did you use? What was your experience like?

JavaBob
09/16/2019 3:53 PM
Source for customable borosilicate glass cylinders for use as a roasting chamber?

shoron
09/06/2019 7:25 AM
how to make medium raw colored beans to dark ?

shoron
09/06/2019 7:24 AM
Grin snwcmpr

snwcmpr
09/04/2019 4:47 PM
Welcome Shoron

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CoffeeAir II Roaster Build
dja
Chad;
Most of the Fuji PID controllers have a autotune function on them, you might want to get some junk beans or even use something like navy beans(never did like the Navy) and let it run a cycle or two to tune the thing.ThumbsUp
this has been a while in the making, maybe mine won't take so long, have to pick up a short section of 2" OD 1/4" wall tube today and the easy part is done except for the make me pretty stuff that comes at the end.

David
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
seedlings
Yeah, David, your project will hopefully be running much, much quicker!

I'll mess with the autotune- good idea with navy beans.

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
dja
well it moves beans, at least the ones that I can keep in the tube.

If the included link works it will show me making a mess of trying to see if 1.5 pounds of green will flow in the monster that I have created.

http://www.youtub...oLl_9LWf2c
Edited by seedlings on 09/03/2010 1:45 AM
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
Unta
looks good david, what are you running the air though? full width perf plate or something else?
Sean Harrington
educate.
 
http://www.untacoffee.com
allenb
dja wrote:
well it moves beans, at least the ones that I can keep in the tube.

If the included link works it will show me making a mess of trying to see if 1.5 pounds of green will flow in the monster that I have created.

http://www.youtube.com/watch?v=EoLl_9LWf2c


David,

I tried to make the Youtube button work but forgot about the issues with it presently.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
dja
peice of screen wire with a 3/16" spacing in a 1.5 inch opening.
Screen wire sits in the recess cut in the end of this peice.

and the you tube is my first go round with that little monster but I will get it to work.
dja attached the following image:
roaster4.jpg

Edited by dja on 09/02/2010 4:16 PM
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
dja
view of bean side of funnel.
Pyrex tube sits on top of this peice, when I am done there will be set screws holding the peices together.
dja attached the following image:
roaster5.jpg

Edited by dja on 09/02/2010 4:19 PM
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
allenb
What is the diameter of the glass roast chamber?

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
dja
3.5 inches inside diameter by 14 inches. some type of pyrex baking tube found at thrift store a couple years ago and have helt onto it cause I knew it would make one rocking roaster 360 degree viewingGrin
lets see if this works.

Ok how do we link to a youtube video

Guess Yourtube is one of them sites that isn't allowed or something.

gotta find a vacumn cleaner motor, or a cheap shop vac for air power, and get the heat strightened out and installed and we will be roasting, top of roaster lifts off for easy dumping and all I have to do for a cooler is turn the heat off, also I will have to make some type of cover otherwise the thing will unload on you all over the floor.
Edited by dja on 09/02/2010 4:58 PM
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
JETROASTER
Did you say "vacuum motor"? I think there are a couple threads on that around here.
Get an idea of what type is best suited, and I'll dig one out of the bone-yard. -Scott
 
dja
thats what they make flea markets for Scott.

I can pick one up at the flea market for less than the shipping, I could use one of the two that I have but I don't really want my coffee tasting like machine shop coolant. And I know where there is a dude that works on "rug suckers", so I may just have to run by there and see if I can get me one of them high dollar Dyson imports, for like on the cheap.

now back to more important things, how does a person post a video on here.Grin
Edited by dja on 09/03/2010 1:42 AM
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
JETROASTER
Most of the Dysons use a single stage Panasonic motor. Nice pressure.
The roaster-chamber base; Is that a little something you popped out of a CNC? Great funnel shape!! -Scott
 
Dan
Shop-Vacs are another source for vacuum motors. I've found that the older, original units develop the most pressure. Or, buy a new unit from Graingers.

Baking tube is a good idea. I hope that the beans don't spout out of the top!
 
http://www.intactamerica.org
dja
all post that I make on my roaster will be in the thread titled AIR ROASTER enjoy
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
seedlings
You can see the K-type TC inbetween the two heat elements. With the hopper on (below) the TC is right under the perf.

i206.photobucket.com/albums/bb54/seedlings/100_6844.jpg

i206.photobucket.com/albums/bb54/seedlings/100_6845.jpg

In this quick video the two temperatures read about the same, but with beans they read different (future video). The upper temp reads much higher than the lower temp with beans loaded.

[video]http://www.youtube.com/watch?v=G2eXoa_2Cyw[/video]

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
Unta
nice test..
Sean Harrington
educate.
 
http://www.untacoffee.com
SteveN
I can only think of two possibilities to explain your issue:

1. TCs aren't measuring the same (calibration or other issue)
2. Placement of the bottom TC between the air streams is causing it.

Of course, I'm not really an expert on TCs....
 
allenb
Chad,

One thing I see that can cause temperature lag problems is the mounting nut next to the sensor tip (TC at heater discharge).

If the nut is touching the TC tip metal it can create a thermal mass and take a while to respond. Does the disparity continue when leaving the temperature consant for a few minutes?

Best practice is to have a bare TC with nothing touching it.

Is the BT TC also not bare and including a mounting nut?

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
seedlings
Can I chop this end of the TC and just twist the wires together? And will this help or hurt?

I can't take the nut off the end. It's siliconed and sandwiched between cement board layers.

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
allenb
seedlings wrote:
Can I chop this end of the TC and just twist the wires together? And will this help or hurt?

I can't take the nut off the end. It's siliconed and sandwiched between cement board layers.

CHAD


I've done a twist (several and tight) without welding the end-bead and gotten what I consider accurate results but it's unorthodox I guess.

I would place a bare TC 1/16th of an inch away from the one we're talking about, blow a heat gun blast towards them and see if there really is much of a delay or bad read before making any changes. It might be fine the way it is.
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
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