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Tri-Clamp Roaster
tofublock
Top  #51 Print Post
Posted on 05/05/2020 5:56 AM

Quote

jessep wrote:

Made some new parts. Replaced my mostly functional, super saggy chaff collector adapter with a 3d printed fitting, and made a new jar mount.

I'm using a material called Greentech Pro from Extrudr, a company in Austria. It gets a little soft at ~100C, but then doesn't get any softer until about 160C. We'll see how it goes!


Not sure I'd trust filament-printed parts around ~200?C (that's not far under the printing temp), but let us know how it goes! It looks pretty nice for sure.

I still haven't received any of my parts, so nothing new to report, sadly.
 
renatoa
Top  #52 Print Post
Posted on 05/05/2020 6:38 AM
To address this heat issue, I am planning to use this great concept, but redesign this piece for my own cyclone, as a flat part, as is the lower flange, to fit the jar cover. And nothing else, will remove the raiser parts used for mounting on the cyclone.
Instead, will mount this flange to the upper cyclone ears by three threaded rods, as those in the right side of the picture.
In the cyclone exit area the temperature is lower than 60 C degrees, for my skin it pass the touch test, so filament will be happy too.
The threaded rods will not bring that much heat from above, I guess.
Edited by renatoa on 05/05/2020 10:02 AM
 
jessep
Top  #53 Print Post
Posted on 10/05/2020 2:49 PM
Update.. I replaced the 1500W Element with a 3500W plastic welder element. Well it said 3300W, but I measured 15.3ohm which I think is closer to 3500.. But my 10a breaker never blew, so I have no idea what it's really drawing...

Old element, notice how high the heater is.. basically maxed out towards the end.. This is about 250G beans
i.ibb.co/kXGCfy1/old-element.png

New Element, notice the heater is generally below 50% the whole run, but now the fan is almost maxed out trying to loft the slightly larger charge of around 300g. One advantage is that with a slightly higher air speed, I think I can negate the FC flick a bit better..

i.ibb.co/gm5Jgrb/new-element.png

Someone was asking about TC placement before, this is what I have.. I'd say it's pretty accurate, if a bit low. FC is generally around 208C, but quite consistent at least.

i.ibb.co/j9NX9Kr/PXL-20201005-184345155.jpg

Old vs new
i.ibb.co/prQ2TDY/PXL-20201005-180746457.jpg

In the end, I think I'd prefer to have something in between here. Or maybe two elements inline like others have done. There's just too much backpressure here, I can't blast the beans out after a roast anymore, and the whole reason for moar power is moar beans.. I think I might be able to approach 400g with this setup, but not with the kind of agitation I'd like..

Feel free to poke holes in my roast profiles, I don't know what I'm doing. I do know the development time wasn't long enough on the latest one though.. my bad..
 
Ooij01
Top  #54 Print Post
Posted on 10/10/2020 2:57 AM
My parts finally arrived and I've reassembled my roaster. I ended up putting one element in each length of pipe inline. Done 2 roasts so far and all good but on the third roast, one of my elements kept tripping the circuit, not sure if it's because I don't have my elements wrapped in mica wrap inside the pipe (whoops). Any ideas of how I can stop this from happening? Is this a grounding issue.

https://photos.ap...JyPcfaVtW8

https://photos.ap...PvTkCTFys5


Thinking of getting a cyclone as well like you and get that hooked up. Currently roasting with a charge of 300g and have accidentally blown some out of the chamber into my chaff collector during cooling due to lack of space to cool when the blower is too high.
Edited by JackH on 10/10/2020 3:44 AM
 
CharcoalRoaster
Top  #55 Print Post
Posted on 10/10/2020 7:53 AM
Yep, wrap those elements inside the steel tube otherwise if they make contact they'll ground out and potentially get fried and you'll have to replace them.
 
Ooij01
Top  #56 Print Post
Posted on 10/10/2020 8:26 AM
Yeh figured that's where I went wrong, thanks :)
 
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