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renatoa wrote:
Anyway, at this level of tinkering, changing heatsink is a fact of life, imo.

renatoa wrote:

Ah, I forgot we are in the FB subforum... my rant was about the high inertia machines, like a drum.
Funny that FB machines are the lowest inertia designs, and for this reason they play well with a (well tuned) PID.
A FB is a machine where heater power is increased gradually, in small steps, without turning point, or other inflexions that are so difficult to follow, due to over or undershoots inherent of a PID functionality.
For example, when using a drum. you jump at TP the heater/burner from 20 to 80% in a second, and the result is seen 2 minutes later, when RoR tops and start decrease. Try to do this with a popper and will end with charcoal :)

tofublock wrote:
CanMan, exactly my thinking with the hoover and leaf blower, although the one you linked to is a funny design that I haven't seen before - most have the inlet to the side.

tofublock wrote:
My components are slowly starting to trickle in, but all the tri-clamp parts are still in transit so there's not much I can do at the moment other than practice roasting with the popper. ;)

CanMan wrote:
though I'm now thinking this may be too high powered for my tiny flat!

Buildit wrote:

Jessep, I am also looking to build something like yours but have a couple of questions.
Where did you buy the cyclone?
is the RC a pyrex or?

One comment on the bean load & unload, have you seen (near the end)
https://www.youtube.com/watch?v=kgDHWPh0QRw
A Tri-clamp TEE with a cap atop (in place of the 180) and a 1" long tube to use as a Vacume- (Blower pressure out) for the beans, but may need to seal around where the 1" goes down in the 1.5"

tofublock wrote:



Well, this is interesting.
I started looking into components for a fluid bed roaster build and fairly quickly arrived at the tri-clamp system. Two quarantine days and a LOT of painful Aliexpress search queries later I have ordered almost all my parts just a few hours ago - and they look eerily like yours. Down to the heating element crammed into the 1.5" pipe ("Will it fit? I'll probably be able to make it fit, with appropriate force if need be.") Maybe I should have searched forums earlier, could have saved me some headache. :)

Here's the parts I ordered:
- Heating element https://www.aliex...09009.html
- Tube 1.5" for heating element https://www.aliex...29764.html
- Reducer 1.5" to 3" (opted for the bowl) https://www.aliex...21509.html
- 3" Meshed gasket as "bed" https://www.aliex...10026.html (also got a 1.5", might work before the reducer as well)
- Tube 3" with thermowell https://www.aliex...03344.html
- 90mm glass tube 3", 122mm length https://www.aliex...25199.html
- Aluminum cyclone https://www.aliex...16520.html
- Some gaskets, clamps, mica paper

What I'm missing (on paper) is the blower, bits of tubing here and there, a chaff bin. And then, once all the parts have arrived and are working well enough, a nice method of inserting and extracting the beans of course.

jooi123 wrote:

any ideas about the best way to get two elements in your build?

jessep wrote:



Just run them in series in a longer 1.5" pipe.. Someone here did that...

jooi123 wrote:



Yup i don't know why that didn't cross my mind

jooi123 wrote:

Thanks fellas, i did have a look at your build jbrux4 and have gone with two 6" pipes :) cant wait for the parts to arrive, i got my roast chamber real fast and the rest are taking their sweeet time

jessep wrote:
Nice! I'm.definitely on the limit power wise right now for more than 200 grams. I think everything else has plenty if headroom for much bigger batches.

I hope all the shipping goes smoothly!