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  • Inconsistent roast

    I have been roasting with my corretto roaster (breadmaker) for years and can do it with my eyes closed.
    Of late I have been left with a roast containing perhaps 5% yellow under roasted beans. This happens with many different single origin roast of good quality beans of various sporting processes.
    I spoke with Andy from beanbay and he believes that it is possibly the more dense beans staying at the bottom of the roasting 'pot'.

    My question is, has anyone else had this problem with my style of roaster and if so did you modify the paddle to lift the beans during agitation.
    Thanks

  • #2
    What type of BM do you use Sam?
    Maybe some photos...

    Mal.

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    • #3
      I am assuming you are using the same same paddle or agitator you have used for years? When was the last time you cleaned your heat gun? Possibly reduced airflow? When I had a corretto it had a modified paddle (from bread making use) since day one of corretto use.

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      • #4
        338 how do clean your heat gun?

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        • Yelta
          Yelta commented
          Editing a comment
          Very important not to allow the heat gun air intake mesh to clog up with chaff, watch closely and clean with a small brush as needed, I run a fan on mine, blows the chaff away from the heat gun and out the door.

      • #5
        Open it up. Mainly just to check chaff etc isn't inside.

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        • #6
          possibly the more dense beans staying at the bottom
          Well... that was part of what I said on Sunday but not the important part.

          Uneven roasts are most likely to be too big a batch size and/or not enough agitation.

          Reduce your batch size and/or move the beans more

          Roasting coffee is simple, heat and agitation is all you actually need to produce a good roasted result.
          (air-flow and profiling etc are methods of tweaking the above to get a different result)



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          • #7
            Thought there might have been a bit more to it....

            Mal.

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            • #8
              Recently I have been roasting with Brazil and Ethiopian Yirg beans from beanbag and I have noticed this happening with Ethiopian beans. It doesn’t happen on Brazil beans and I roast both with practically the same technique and batch size as they’re a relatively similar size and density bean.

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              • #9
                Apart from what Andy suggested I'd be def be following up on the heat gun.
                Apart from partly blocked intake / mesh area could be a number of things internally....damned planned obscelence!
                Same as with anything coffee change one thing at a time.
                Se if you can borrow another heat gun. Preferably the same as your using. GL

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