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  • #16
    Originally posted by JamesM View Post
    I remember a while back when I was struggling with channeling. My solution was to stop doing extra crap at the dose and distribution stage. If I was able to dose the basket in a reasonably clean and 'centred' way, straight from the grinder, then forget levelling, sweeping, WDT, or any of that stuff. just stomp it with the tamper and brew. Don't even 'twist' or 'polish' the top of the puck with your tamper. Every thing you do to that bed of grinds is just going to screw it up even more.

    Often overlooked or not considered is how rough you can be with the dosed portafilter when locking it in to your machine, if you are clanging and banging that PF in to the group head, of course it's going to also destroy that bed of grinds before brewing. Be very gentle with it after dose/tamp

    Over-complicating the dose/distribution/tamp process can easily result in issues in the cup. Keep it simple!
    I agree fully I have found one firm tamp to make all the difference

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    • #17
      I get the impression that some machines are more 'dose sensitive' than others.
      My Perfetta is very dose sensitive and if I under or overdose I can guarantee that the result will be inferior.
      If I get channelling it will generally be with an overdose. Underdosing produces a slightly thinner faster pour.
      Sometimes I have two Demis under the double basket PF and only one spout will produce. I just shut off the pour and start again and immediately the other spout will deliver.
      I take a lot of care to have precisely the right dose in the PF to get the best pour.

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      • #18
        I used this test but used couscous instead- the particles are finer and you get a more accurate result.

        It's great to know the level where your coffee is just clear of the shower screen

        Also I agree with JamesM - i just time the shot from my grinder and do a single tamp. no fancy tapping or levelling. ( but i do a single twist and polish- beacuse i like that bit) Occassionally adjust the time if necessary.

        I'm no expert mind you but getting consistent results....

        Originally posted by David8 View Post
        . Filter basket got a rice test and a 5c test.

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        • #19
          Just my 5cents worth, maybe try distributing the coffee evenly across the basket with your index finger or back of a knife. This often leads to an even extraction.

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          • #20
            Like said- Beans, Grind, Dose and tamp and distribution



            The thing is, just change one of the above at a time, changing too many things at once just makes you more confused.
            Last edited by C-man; 20 July 2012, 06:19 PM.

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