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11/04/2019 1:58 AM
+1 snwcmpr

11/03/2019 2:16 AM
Can we make the shoutbox UNAVAILABLE until a member has a certain number of posts?

11/01/2019 2:20 AM
Funopt, please post in the gas and electric heat sources forum

10/30/2019 5:17 AM
Can someone help me for using forced propane burner as my heating element. I rather want to use lpg than electric. Do you think it would work

10/22/2019 5:31 AM
Thanks to you all....... I was not sleeping ... I stayed awake worried about it all. :)

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Fluidbed Roaster project
Hi everyone,
I've been browsing this forum for quiet some time now and have finally decided to take the plunge and build my own roaster. I have posted regarding "fan/blower sizing" on the r/roasting subreddit, but was directed here as this forum is quite active. Here was my post:

I'm looking into building a small, benchtop coffee roaster capable of roasting batches of approximately 200 grams. It will be a fluid bed design utilizing an 1800W heat gun element paired with a 12VDC fan. Ultimately, the fan and heat source will be controlled via the TC4+ Arduino shield. Since I would like to keep the design as small as possible, I am on the lookout for a compact fan with a sufficient static pressure and airflow to loft the beans during roasting. I came across this particular fan ( ) and was hoping to get some feedback on it's suitability? It has a small 60mm x 60 mm footprint, 7"H2O static pressure, and 66.4CFM flow rate.

I was informed that the fan I had selected likely would not work, and a vacuum motor/blower would be more suitable. So I am now on the hunt for a compact (ideally less than 100mm x 100mm) fan that can be used in a 250g fluid bed roaster and was hoping to find some answers via this forum. I found a Dyson DC16 handheld vacuum in a local buy and sell for $40, which may meet my criteria in terms of size, but I'm unsure about air flow...

This is my first project of this type and I am looking forward to learning from the expertise in this forum. Thanks in advance for your feedback!
Vac motor is definitely the way to go as it will have the necessary CFM to circulate your beans. Look on eBay as I've had luck finding really great motors that have already been excised from their vacuums for the same price range. Both of mine are bypass not flow thru types
Thanks for the advice! The more I read, the more I understand why people opt for vacuum motors. I guess my next question would be, would a 24V vacuum motor work? I ask for two reasons - Firstly, the TC4+ is designed for DC fans and this would make control a little easier (no need for a dimmer switch). Secondly, I am looking at the following motor (https://www.ebay....3830540125) as it is fairly compact. It comes from this vacuum -https://www.rowen...2210018532
Edited by cdrake39 on 11/06/2019 9:47 AM
Love those links....

KKTO Roaster.
My bad, just fixed them so they are clickable.
Thanks, it just makes it easier for everyone.

KKTO Roaster.
So I opted for this fan (https://www.aliex...b201603_52). I read about another roaster who had great success with this particular fan, so I figured I'd go for it. I have a few other details to sort out, so I didn't mind the long shipping time. Once parts begin to arrive I'll make a post regarding progress.
Sourced the control board too ?
Yep, got that as well!
Where did you source the control board from?
There are two options on the Aliexpress link - with and without the control board. Or are you referring to the TC4+ board? In that case it was sourced from here: https://www.tindi...-tc4-plus/
Nope, motor control board.
Noticed it in the pictures, but not the option to buy.
Now I see the seller notes.
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