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Thread: 3D Printed Compact Bean Cooler

  1. #1
    Junior Member
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    3D Printed Compact Bean Cooler

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I made a bean cooler to go with my Arduino-controlled popper. Compared to what has been posted on the forum by others, e.g. DIY Bean Cooler, it is compact and easy to store.

    I used a 120mm PC case fan (with green LED for dramatic effect!) and 3d-printed the housing. Here is the final product switched on.


    Because the way 3d printers work, the housing was split into two parts. 4 bolts and nuts were used to secure them with the fan.


    Close-up shot of the drazzling green light


    My popper takes 120g green beans and ends up with 100g roasted. The housing takes a 180mm sieve which can accommodate a lot more than 100g of beans.


    Part list:
    1 x 120mm PC case fan, $8
    4 x bolts and nuts
    1 x 12V power adapter (re-used)
    3D printing material, $2

    I have no doubt it will work well to my need (100g). Can't wait to test it on the next roast day!

    Possible next steps: maybe change to a 5V USB fan, because who doesn't have 1 or 2 too many USB power chargers

    Cheers
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    Dimal, fg1972, flynnaus and 6 others like this.

  2. #2
    Mal Dimal's Avatar
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    Love it...

    Mal.
    robusto likes this.

  3. #3
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    Awesome idea! Would love to hear how fast it cools.

  4. #4
    CoffeeSnobs Owner Andy's Avatar
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    Great work, love the LED fan.

    "does it come in other colours" -- Diana Fisher
    Dimal and Sullo like this.

  5. #5
    Senior Member artman's Avatar
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    Awesome!! Pimp My Cooler!!

    Cheers

  6. #6
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    Quote Originally Posted by dimmy View Post
    Awesome idea! Would love to hear how fast it cools.
    The air flow of the case fan is rated at 69.69 CFM which after conversion is half of the 200mm fan used by the bucket/exhaust fan method. But the area of the opening is only 36% as large (120*120 / 200*200). And given the amount of beans is 100g compared to 500g-1kg by others , I am pretty confident it should work. Anyway the next roast day is Saturday. I will report back soon.

    Quote Originally Posted by Andy View Post
    Great work, love the LED fan.

    "does it come in other colours" -- Diana Fisher
    Which of the 16 million colors is your favorite?


    After I got the fan I chose ($8) at the local computer store, I asked for the cheapest fan they had. The guy gave me a look, pulled a box under the desk and found me a fan without package. The receipt showed it was $5 and was marked as **OEM**. It was obviously used but in as-new condition. I assume it was taken from a returned custom built PC. Surprisingly it was one of the higher end case fan that came with RGB LEDs and a 4-pin connector. After checking out the datasheet, it turned out to be not as hard as I initially thought. They took 5V and 10mA for each LED. So I didn't even need any LED drivers - just an Arduino UNO did the job.
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  7. #7
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    Behmor Coffee Roaster
    pretty effective at cooling is it?
    like the idea of it, have to learn 3d software so I can try print something like it!



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