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allenb
12/01/2022 11:20 AM
temkhabana Welcome

renatoa
12/01/2022 3:54 AM
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11/30/2022 4:54 PM
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11/30/2022 6:27 AM
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renatoa
11/28/2022 2:46 AM
Welcome, @Microfiche

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1 lb drum build
Scooter75
one more try.
Scooter75 attached the following image:
roasterback.jpg
 
Scooter75
only taking one picture at a time.
Scooter75 attached the following image:
roasterfront_2.jpg
 
Scooter75
last one. gotta figure this out.
Scooter75 attached the following images:
roasterfront_2_1.jpg roasterback_1.jpg

Edited by JackH on 02/09/2020 2:46 PM
 
JackH
I was able to add your photos to the last post. You are clicking on browse and then the file? Then the second file the same way, then post reply. You should be able to post up to 8 photos.

We have had some weird problems in the past with certain photos not loading which I never could figure out.
---Jack

KKTO Roaster.
 
CharcoalRoaster

Quote

We have had some weird problems in the past with certain photos not loading which I never could figure out.


I've literally never been able to upload a file through the forum. I usually have to post a dropbox link. Could never figure it out either and I've been around a while Shocklimb
 
JackH
It is probably better to use a hosting site so you can place your photos where you want them in the text.
---Jack

KKTO Roaster.
 
Scooter75
Well, I was able to post 2 of the 3 pics I wanted to. The 3rd just wouldn't load. I tried to post all 3 in the same post and wouldn't do it. That is why I had one post per picture. Tried the last pic and no dice, which was post #23. It showed up without the picture I attached. It followed the same format as the first 2.

Also, if I had no text in the post it wouldn't post a picture by itself. Tried multiple times on my second and third posts.
 
JackH
It is strange. I have members that have trouble with photos and then I have this post with lots of photos posted:
https://forum.hom...ad_id=5866


I sent you a PM. You can email me the photos and I will try to get them on the site.
Sorry for the trouble.
Edited by JackH on 02/09/2020 5:57 PM
---Jack

KKTO Roaster.
 
Scooter75
Been a little bit since i posted any updates so here it goes.

pics goes from right to left, first pic is on the right last is on left to follow my description. I didn't realize that the pics would post last to first. Sorry, but i did figure out how to resize them and get them up!

first pic is the funnel and drop door. Got the sightglass in and the funnel fabbed and fit.

Going to mount this roaster on a cart, kinda like the 3 tier from Ikea. Top is the roaster, middle is going to be the cooling tray and fan, bottom is the catch all.

second pic it the discharge chute to cooling tray. 2" ss tube.

Found one of the aluminium dust separators on Amazon and using it for a chaff separator.

last pics of it installed.

It is coming along. next it to get the burner installed. The hole under the drop door is going to be the sightglass for it.
Scooter75 attached the following images:
topchaff.jpg backchaff.jpg mountchaff.jpg dropchute.jpg dumpandfunnel.jpg

Edited by Scooter75 on 02/28/2020 8:41 PM
 
renatoa
What fan are you intending to use for cyclone exhaust ?
 
Scooter75
I have a draft fan from a furnace that I am going to use.
 
renatoa
Is there anything close for sale somewhere on the internet as we write ?
If not handy for a picture, please can you describe in some words? Similar to a vac blower ? leaf blades, or centrifugal? size... ? cfm...
Curious to hear how will adapt the 30 mm pipe of cyclone to this fan.
 
mkane
big copper fittings
Always learning
 
Scooter75
The fan will be built into a box on the middle tier.

Pic of a fan similar to the one I am using:
https://www.theac...tIEALw_wcB
On the outlet of the cyclone I plan on having a 1" piece of copper pipe that I braze into a 1 1/2" tee. 1 1/2" stainless steel tube will fit inside the copper. Trim the SS tube to make a rotary damper in the tee and run one side of the tee down to the box the fan is mount in to draw suction.

I know this is a little hard to picture so I will post pics when I have the materials to make it.

Also plan on making another box next to the fan box that I can damp off and on to use as my cooling fan for the beans.

My goal is to make this as small a foot print that I can. So far the only overhangs will be the control panel in the front, motor and cyclone in the back, and a small overhang on the right side for gas control.
Edited by JackH on 03/01/2020 3:03 PM
 
renatoa
Yes, my goal too, small footprint, but so far didn't found any such motor in the 10 cm diameter of the cyclone, only leaf blade fans, for inline duct exhaust, that aren't as powerful as I like in the cooling phase... good for chaff, but not for fast heat exhaust.
The fan you pictured here are at least 20 cm diameter the smallest... their inner hole is big enough to eat the upper part of cyclone Grin... and too powerful I am afraid.
 
Scooter75
This weekends work.

Focused on the middle tier. In it contains a cooling tray, for lack of better words vacuum box, a damper in between them and a rotary damper off the cyclone.

Finalized the burner also. 1" ss tube, jet burner drilled out to 71 orifice and maxitrol 325-3 regulator regulated by Dwyer 1-5 scfm flow meter with needle valve.
Scooter75 attached the following images:
side_midtier.jpg motors_1.jpg damperopen.jpg backcyclone.jpg burner_3.jpg
 
Ringo
i would think a draft fan for a furnace would be a great fan. More air than you need but put a gate before the fan and you can set it where you want. Your heat looks great, guessing you will have it turned back most of the time. But with air and heat its better to have too much then just cut it back to where you need it.
All you need in life is ignorance and confidence, and then success is sure. Mark Twain
 
allenb
I second Ringo's comments. Nice build and perfect flame mix from your burner! Keep the progress reports coming.
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
Scooter75
Thanks for your positive comments Ringo!

The T on top of the cyclone is a damper.

I plan on putting the fan on a rheostat for control.

Hoping to have this fired up in the next month.
 
goat4hooves
Christian,

Great build. Thanks for sharing. It looks like it will be a nice roaster. Will follow your progress. Keep up the good work.

What vane configuration did you end up going with? Have you had a chance to test it out with beans in the drum to see how they tumble?
 
Scooter75
i haven't been very good about keeping this updated.

It's finished!

It is a 3 vane drum that has variable speed to 100 rpm. Been roasting at 75-80 rpm

I have about 20 or so roasts on it now. Way different than my KKTO. I have a lot more to pay attention to, gas and air flow. Coffee is getting better, just lots to learn.

Changed my original damper out to one closer to the exit of the roaster instead of on top of the cyclone. The speed control on the exhaust fan did not respond as fast nor as accurate as i would have liked so it was moved closer to where I sit. The damper on the cyclone worked really well just a reach.

I wanted to thank everyone for there help with this, without you it would have been a lot more difficult with an extreme amount of trial and error.
Scooter75 attached the following images:
cooling1.jpg gauge1.jpg lftside1.jpg rtside1.jpg
 
allenb
Hey Scoot, You are one heck of a roaster builder! This is off the chart nice to say the least. It will take a little time to get to know your new roaster but soon you will have it down to where you are only making a couple of adjustments throughout a roast to keep the trajectory where you want it and will be cupping some fine coffee. Keep us updated often!

Cheers
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
Scooter75
Thanks Allen.

It was a lot of fun to build. Thanks for all your support. It really did make a difference.

I bought 15 pounds of a cheap brazilian to learn with and gave most of it away except for the couple of pounds I burnt. Been doing some Bolivian Bio-aribica, Yemen, sulawesi, and a tanzanian. Have a good friend who is even geekier with coffee than I am and he has been impressed with my roasting, so I guess I'm doing ok. I for the most part have enjoyed what I have done so far with it.

Thanks again!
 
goat4hooves
It's great to hear that the roaster is up and running. Happy roasting. It will be interesting to see where your roasters sweet spot ends up. How many oz or g are you able to roast at one time?

Do you happen to have pictures of your mixing vane configuration that you would be willing to share?

I look forward to future reports.
 
Scooter75
I roast 454 grams. When I built it I used the formula I found on here and according to it I can go to 575 grams. I just want to have an even number to roast so I haven't done much more than 454g but have done less because I had 400 grams of an Ethiopian that I needed to roast. It turned out well according to my coffee geek friend.

Sorry, I totally forgot to take pictures of my drum and vanes when I had the chance to.

I used a 3 vane that I welded to 2 spyders, one at the very back and one in about 2.75" from front skewed at about 25 degrees. The vane bringing the beans to the front comes up to about 3/4" from the front and the vane going to the back comes about 1 1/4" in front of the spyder to accommodate the BT thermocouple.

My drum is made from 6" schedule 10 stainless steel pipe. Spiders are out of 304 ss plate and vanes are canned from 16ga 304 ss. Shaft is 1/2" cold rolled steel. Mesh on back is 18/8 ss from a steamer I picked up and added additional holes.

I took a couple of pics just now from the drop door. I will post them later, I have to resize and rename them on my computer because I can't post pics directly from my phone. Just a warning, they are not very good but will give you an idea about how I did it.
 
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