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Mathew
09/17/2019 5:50 AM
check out the Hive Roaster!

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

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Transparent Fluid Bed Design
revive
Beautiful design. I actually came across your youtube vid before seeing your full breakdown of the build here.. excellent work!

Out of curiosity, where did you source the cyclone from? And did you custom make the new copper copper and SS bean cone or are those off the shelf?

Great work!
 
CK
An upgrade for the roaster to quiet the machine down.

These copper intake pipes bring air from inside the machine through holes in the bottom plate of the body. With the solid intake spacer ring, it now has a lower operating sound of 65 DB at 50% fan... quite comfortable to be around while roasting. (Before this modification, it was a loud 73-75 DB.)
CK attached the following image:
copper_intake_pipes.jpg
 
CK
revive wrote:

Out of curiosity, where did you source the cyclone from? And did you custom make the new copper cone and SS bean cone or are those off the shelf?


The cyclone was bought here;
https://www.amazo...&psc=1

The copper cone is an off the shelf 2" to 3/4" pipe reducer fitting bought here;
https://www.amazo...&psc=1
It was cut, filed and then bonded to the SS cone.

The SS cone was left over from another project. It too was cut and filed to custom specs for this RC. It was bought here;
https://www.amazo...&psc=1
 
revive
CK wrote:

revive wrote:

Out of curiosity, where did you source the cyclone from? And did you custom make the new copper cone and SS bean cone or are those off the shelf?


The cyclone was bought here;
https://www.amazo...&psc=1

The copper cone is an off the shelf 2" to 3/4" pipe reducer fitting bought here;
https://www.amazo...&psc=1
It was cut, filed and then bonded to the SS cone.

The SS cone was left over from another project. It too was cut and filed to custom specs for this RC. It was bought here;
https://www.amazo...&psc=1


Very nice, and very resourceful indeed!!
I just noticed them, but your chambers are tapered...what did you use for them??
 
CK

I just noticed them, but your chambers are tapered...what did you use for them??


https://www.ikea..../90279719/
 
renatoa
hmmm... 1 l at 27 cm height give 7 cm diameter, are they really so slim ?
You complained about not enough capacity/column height... what about rebuild with bake-a-round glass ?
 
CK
renatoa wrote:

hmmm... 1 l at 27 cm height give 7 cm diameter, are they really so slim?


The RC has an inner diameter of about 8.5 cm (9 cm outer diameter).

It's perfect for 250-300g bean charge, as long as the blower isn't set too high for cooling. Good enough for my home use. However, in the interest of inventing something, I am working on another RC idea for this build... something modular that will integrate with the base unit.
 
CK
Here is the new location for the BT probe. This location yields more accurate results for BT. In the previous build, it was in the exhaust area, but that reading was skewed by about + or - 10C depending on what part of the roast was being read (beginning or end). It has NIB magnets in the handle to fix it securely to the RC or the holster.
CK attached the following images:
bt_probe_port.jpg bt_probe_holster.jpg
 
RobS
CK wrote:

This is a CAD bottom and top section view of the heater and how it was made. These show the intake and exhaust air flow pattern through the custom heat coils.


if you don't mind me asking what did you use for the springs to keep the heating elements apart as well as what was used to keep the bottom element in the housing so it would not touch the wood.

thank you
Rob
 
CK
The springs were from a Meccano set I had laying around. Any light duty spring/springs would work... They are held in place by friction fitting over the end of the screws and nuts that hold the upper and lower mica plates together. The origninal rivets joining the mica plates were removed to customize the heater coils for this build.

The heater housing is from the Twobiu air popper, and is designed from the factory to raise the heater (heater 1) off the machine.
 
RobS
I have a housing very similar but there doesn't seem to be anything to hold the coil up might be I just wasn't paying enough attention when I took it apart. Do you happen to have a picture of how you mounted the motor. I am thinking of mounting it in between two plywood plates with 4" PVC as the body and the intake in a friction fit hole out the top and plumb it to the heat chamber from the PVC body.
Any advice is greatly appreciated
Thanks
 
RobS
Do you think a filet of rtv would be ok to hold it in place
The heater # 1
 
CK
Page 2 of this post shows the motor location... it was mounted using custom 3D printed housings for the top and bottom engagements.
 
CK
RTV will hold anything but it's permanent. I used Silco 6500 high temp. It's great for making an air tight air supply from the blower to the heater. A caution though, once you use it, it's a one way ticket... messy stuff. I tested my machine for many hours before using the silicone to finalize designs.
 
RobS
perfect thanks. I did see your 3d printed housing but I do not have access to a 3d printer I do however have a cnc router but to make a deep housing I would have to slice it and then laminate it together but PVC housing would make it more DIY friendly. did you mount the motor like it was in the vacuum front ring and the rubber rectangle on the back?
 
CK
RobS wrote:

Did you mount the motor like it was in the vacuum front ring and the rubber rectangle on the back?


Yes, both end mounts were printed according to the original vacuum specs.
 
greenthumb
Awesome build! I was wondering where you sourced the copper bean cone? You mentioned that it was off the shelf and just wondering if you found it in a hardware store or line.

Thanks!
 
CK
Thanks Greenthumb.

The copper cone is an off the shelf 2" to 3/4" pipe reducer fitting bought here;
https://www.amazo...&psc=1
It was cut, filed and then bonded to the SS cone.


The image on Amazon isn't representative of the actual part... it is a cone shaped reducer fitting. Real copper, and heavy duty.
 
renatoa
This is a real 2 to 3/4 reducer image Grin

https://www.olymp...ng-reducer
renatoa attached the following image:
wp02-32-12-3.jpg

Edited by renatoa on 03/31/2019 7:57 PM
 
CK
Thanks Renatoa, that link is a correct representation image for what the reducer looks like...
 
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