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Help, underextraction on Breville Bambino Plus

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  • #16
    Hi SMMMB,

    I started out with the same combo, the Bambino with the SGP. I was generally around grind setting 12 with fresh beans. Makes me wonder if the grinder is set differently, per level3ninja's comment above.


    Edited to add:
    I now use the Breville single wall double basket with 16g (wife does the single wall single basket with 9g) and this works out ok. I do have a different grinder now. Is making me think the volume of coffee is not the thing affecting your results.



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    • jafa1970
      jafa1970 commented
      Editing a comment
      I go for a 2:1 ration, so aiming for 32g from 16g.

      Regarding gap, before brewing, there is probably 5mm, maybe a bit more.

    • SylvesterMcMonkeyMcBean
      SylvesterMcMonkeyMcBean commented
      Editing a comment
      Do you stop the extraction when you get to 32g or is that what you get when it automatically stops? sorry, beginner questions here.

    • jafa1970
      jafa1970 commented
      Editing a comment
      I weigh the output. Have set the two shot button to be very large and use the scales to let me know when to stop.

  • #17
    Well I think I had a breakthrough. I changed the grind setting in the burr down by one to "5" from "6" as suggested, and changed the grind size setting to 12, then 8, then 5. At 5, I finally got an extraction that lasted 28 seconds, giving 39 grams of coffee out (22g of coffee in the basket). Now I think it's possibly a little bitter, maybe the last few seconds are overextracted. Still not a "sweet" coffee but an improvement away from the sour coffee from yesterday. The finer grind meant that tamping pressure was less, too. I am using the razor provided to check the level of coffee in the basket. I think the distribution is probably okay because I'm not getting much channeling and it only lasts maybe a second when it happens.

    Happily, the Breville basket arrives in the post today so I can experiment with that too (the MATOW basket is probably not the highest quality).

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    • #18
      Trying new beans (Crave, the ones that come from Breville as part of the fathers day promotion) the last couple of days has improved things, the extraction seems to be ticking all the boxes in terms of dose, time, yield, no channeling... it tastes all right but not fantastic. Is this just a case of finding the right beans to suit my tastes or is there something else I could be doing better?

      Thanks for all comments so far.

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      • #19
        There is a fair bit of muscle memory required in order to make very consistent shots (not just in grams and seconds but extraction etc). Keep making more coffee and you'll gradually build more muscle memory. Once that happens you'll be able to make very small adjustments for fine tuning.

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        • #20
          I am really excited. Today I made a coffee that I'm pretty happy with. I'm not even sure what it is that I'm doing differently but maybe level3ninja is right, just takes lots of practice! Latte art is still kind of awful.. but I'm working on that. I'm really enjoying this new lockdown hobby. I'm jittering so much I'm surprised I can type at all.

          Thanks everyone.

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