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Channelling around edges?

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  • #16
    Originally posted by Dimal View Post
    G'day Rocky...

    When was the last time you had the machine in for service and requested a "Scace" test and adjustment?
    If everything regarding your grind, dose, distribution and tamp is Ok then it could be down to a machine adjustment.
    Mal.
    In the past there was nobody who serviced Home Espresso machines up here in the sticks. I tried a few local electricians years ago and nobody was doing it.
    Makes me wonder who services the commercial machines in the local cafes. Has to be someone doing this. I will ask at my favourite cafes.
    I have had temperature problems with the Diadema throughout my ownership and have played around with the Thermostat setting including replacement, but seems to be a machine that heats up excessively.
    I address this by putting about half a tank of water through it in cooling flush before I pull a shot. It is very dose sensitive and a lighter dose is always required.
    I regularly stop the pour, tamp the channels with a spoon, and resume the pour. This works surprisingly well. It's just annoying.

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    • #17
      Hi again Rocky...

      You could try CSer "sprezzatura" as I believe he does a lot of commercial work along the central coast.
      If not, he may know of someone who does...

      Mal.

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      • #18
        Originally posted by Rocky View Post
        I have had temperature problems with the Diadema throughout my ownership and have played around with the Thermostat setting including replacement, but seems to be a machine that heats up excessively.
        The thermostat in the Perfetta is incredibly sensitive. Even the smallest adjustment you can possibly make will result in a 3-5C change in the upper/lower cut-off.

        I recently completed one and adjusted the thermostat to come on at 95-97C resulting in a cut-off of 108-110C. This yielded a reasonably stable group temperature with less of a cooling flush needed.

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        • #19
          Thanks Mal, noted!

          Noidle - that's interesting to hear. I went through a period of trying to adjust the thermostat by tiny increments without much success.
          It would always be either too hot or too cool - I couldn't get the sweet spot. Eventually I replaced the thermostat just to be sure it was not faulty.
          It's not a big drama as I can manipulate the water temp via the cooling flushes, and even the channeling doesn't reduce the shot quality to a standard that would be unacceptable to me - it's just a messy process.
          My next machine will be a more sophisticated model with accurate temperature control.

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