Jura ENA Micro 9 - Espresso too weak, even with powder

    • Jura ENA Micro 9 - Espresso too weak, even with powder

      Hersteller: Jura | Typ-/Modell: ENA Micro 9 | ca. Baujahr: 2011

      I hope you don't mind me posting my question in English.
      For both the 'espresso' and 'coffee' function on my machine, the coffee runs rather quickly from the spout, the crema is lightly coloured, the taste is weak and lacks depth, e.g. no caramel.
      It is the same when using the built-in grinder or pre-ground coffee, I use Lavazza Espresso 5/10.
      Initially the coffee also tasted sour, and I noticed the grounds in the bottom tray were coarse and uneven. So I changed the grinder to its finest setting, and after opening the machine, even a few notches beyond the official finest setting. This got rid of the sour taste but the coffee is still weak.
      I have given the machine a thorough clean and replaced practically every item that came with the Reparatur Wartungsset / Inspektionsset PREMIUM (XXXL).
      Any suggestions on what I could do to the machine to get a richer, deeper espresso?
      Danke schön!
      Cees.

      Mechanische Kenntnisse vorhanden: JA | Elektrische Kentnisse vorhanden: JA | Messgerät vorhanden: JA

    • Hello,

      seems the grinder is worn. You will need a new
      COMPLETE grinder.

      But there are two different grinders for the Micro 9.
      and they are not compatible!

      Take a photo from your grinding cone and let us
      see which grinder ist the right für your Micro 9.

      Also stop the time the grinder mills at "strong" cup.
      and let us know whether ist about 7.2 seconds or
      3.4 seconds. ("normal" cup 6.0 or 2.7 seconds).

      Belonging to the Lavazza-Powder it could be too
      less powder you took, or its not fresh enough.
      Furthermore ground espresso usually has not the
      right fineness for a fully automatic coffee machine.
      Normaly its milled too fine.

      BS
      Immer logisch und Schritt für Schritt vorgehen. Blinder Aktionismus kostet Zeit und Geld.
      Küche: Jura GIGA 5 Pianoblack-Chrom Bj: 2012
      Büro: [sJura GIGA X3 ALU Bj: 2014

    • Thank you for your answers BlackSheep,
      Before I spend the money, is there a way to establish without doubt that 1. the grinder is worn out, and 2. that's the only problem?
      Regarding the pre-ground powder: I tried different amounts and it came from a brand new pack. It is indeed much finer than what the machine grinds itself. What would too fine powder do to the end result?
      Thanks,
      Cees.

    • Hello,

      before I can answer some of your questions, do what I said before.
      I didnt´t ask for that as a joke.

      BlackSheep schrieb:

      Take a photo from your grinding cone and let us
      see which grinder ist the right für your Micro 9.

      BlackSheep schrieb:

      Also stop the time the grinder mills at "strong" cup.
      and let us know whether ist about 7.2 seconds or
      3.4 seconds.

      Then we will look forward.

      Too fine powder clog the brew sieve and also the coffee tastes worse.
      I also can cause further damages at the brewing unit.

      BS
      Immer logisch und Schritt für Schritt vorgehen. Blinder Aktionismus kostet Zeit und Geld.
      Küche: Jura GIGA 5 Pianoblack-Chrom Bj: 2012
      Büro: [sJura GIGA X3 ALU Bj: 2014

    • Hello,

      can you see the grinding cone I asked for?
      I see only beans...

      The machine seems to need a normal grinder, when
      the grinding take about 7,2 seconds.

      disassemble the mill and clean it completly. than set
      the fineness of the coffeepowder compareable to
      "normal household-sugar".
      The brewing chamber should be filled by coffee-strong
      to about 3/4 to 4/5.

      If not you have to change the complete coffeegrinder:
      komtra.de/jura-ersatzteile/jur…ne-kranz-extra-leise.html
      or at least the grinder ring:
      komtra.de/jura-ersatzteile/jur…-kaffeevollautomaten.html

      Only take this - not V5 or "revidiert"

      BS
      Immer logisch und Schritt für Schritt vorgehen. Blinder Aktionismus kostet Zeit und Geld.
      Küche: Jura GIGA 5 Pianoblack-Chrom Bj: 2012
      Büro: [sJura GIGA X3 ALU Bj: 2014

    • As attached.
      Not sure what detail you're interested in so I took a few shots. Hard to get the camera to focus on the teeth down deep.
      I'll report back once I've done the cleaning. May take 2 weeks.
      C.
      Bilder

      • Grinder Cone 1.jpg

        221,63 kB, 1.208×1.098, 93 mal angesehen

      • Grinder Cone 2.jpg

        168,29 kB, 868×865, 90 mal angesehen

      • Grinder Cone 3.jpg

        282,79 kB, 1.039×1.028, 95 mal angesehen

      • Grinder Cone 4.jpg

        207,28 kB, 852×866, 88 mal angesehen
      INFO-VIDEO

    Hilfe zur selbstständigen Reparatur von Kaffeevollautomaten (Jura, Delonghi, Siemens u.v.m.)