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Thread: New Grinder... a few questions.

  1. #1
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    New Grinder... a few questions.

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    So I picked up the new grinder (Gaggia MDF) this morning and have had a wee play - I WAS supposed to open it xmas day but couldnt help myself ;)

    Wow, what a difference, my extractions seem to be okay, 20 - 30 secs, nice crema etc etc. I was wondering if the grind was a little too fine as I seem to be getting some channelling on the top of the puck (not at the sides).

    I am thinking that my grind is still a little too fine, or I am not quite putting enough coffee in the basket, though if I put in too much, I end up not being able to lock in the PF.

    As I have not used a real grinder before and have only used a blade and than a very good quality hand grinder I am having to relearn this grinding pallaver all over again.



  2. #2
    Senior Member robusto's Avatar
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    Re: New Grinder... a few questions.

    Congrats Lucinda. There just isnt any comparison between a choper grinder and a burr.

    If you are getting 60 mls in approx 30 seconds, and the portafilter locks on readily....and the coffee tastes good, there should be no problem with the grind setting.

    Can you tell there is channelling? It may be the puck broken up after extraction, parts of it sticking to the shower screen. If it is decidely wet, soppy looking, you need to increase your dose.

    Try weighing the loaded basket, aiming for between 14 and 20 grams.

    --Robusto

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    Mal Dimal's Avatar
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    Re: New Grinder... a few questions.

    Quote Originally Posted by lucinda link=1166755371/0#0 date=1166755370
    Wow, what a difference, my extractions seem to be okay, 20 - 30 secs, nice crema etc etc. I was wondering if the grind was a little too fine as I seem to be getting some channelling on the top of the puck (not at the sides).
    Hi Cindy,

    Any chance of taking a couple of photos of the top of the puck before you knock it out? Also, have you tried the dosing/tamping method that 2mcm recommends? It seems to have improved the dosing/tamping consistency for a few people so might be worth trying.

    Im not at all familiar with the Classic other than what I have read from owners like yourself here in CS but as with all machines, I think the same rules still apply in that the final dose when tamped with your usual tamping force, should be stamped with the impression of your Classics Shower-screen and/or Dispersion Nut/Fixing Screw when the PF is locked in to its normal brew position. Its easy to do, just try it before switching your Classic on next time and after making sure that the Shower-screen is dry, Lock and Remove the PF after dosing/tamping to see what sort of impression is left behind and adjust the dosing regime until you can get the same result each time. A bit of mucking around but worth it in the end.

    All the best,
    Mal.

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    Re: New Grinder... a few questions.

    When I was using the hand grinder I was getting a pretty consistant stamping of the screw so I think it is just a matter of playing around and adjusting ,tamping, dosing etc.

    I am using the beans that I got with the grinder and they are reasonably fresh - roasted monday - but not the samer as my own of course.

    So yeah I think it is a matter of just playing around with the grinder settings and I dont think I am tamping hard enough. So I will just have to keep making coffee until I get it right - what a terrible shame ;) ;D

    The grinder is great though.

  5. #5
    Senior Member robusto's Avatar
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    Re: New Grinder... a few questions.

    You need to be consistent with tamping, Lucinda. Try the bathroom scale method: put the scales on your bench, and press down with the tamper, noting when you reach 14 kg pressure.

    Note how that feels in your arm, wrist etc. Then do it with your eyes closed, looking to replicate that feel. Compare that moment when, by George, you think youve got it, with the reading on the scales.

    When the two correspond time after time, youre home.

    Make sure you tamp directly down perpendicular to the basket so that the dry puck is level all round.

    Good luck
    Robusto

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    Flo
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    Re: New Grinder... a few questions.

    Quote Originally Posted by lucinda link=1166755371/0#3 date=1166767438
    I am using the beans that I got with the grinder and they are reasonably fresh - roasted monday - but not the samer as my own of course.
    Roasted Monday?...Reasonably fresh?... :-? I wouldnt have even considered using them until maybe tomorrow.. :P

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    Senior Member robusto's Avatar
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    Re: New Grinder... a few questions.

    Having been rested for 4 days, the beans should be fit for consumption.

    --Robusto

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    Bon
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    Re: New Grinder... a few questions.

    Just to second what robusto said - your tamp must be consistent.

    Your dose, your distribution and your tamp are three variables you want to keep consistent every time. That way the only variable you adjust is your grind... far easier to adjust one variable to get the desired results than several.

    Adjusting more than one variable at a time is searching for a needle in a hay stack, if you get the desired result its only going to be because of pot luck and youll never be able to replicate it.


  9. #9
    Senior Member robusto's Avatar
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    Re: New Grinder... a few questions.

    Quote Originally Posted by Bon link=1166755371/0#7 date=1166785829
    Adjusting more than one variable at a time is searching for a needle in a hay stack, if you get the desired result its only going to be because of pot luck and youll never be able to replicate it.
    How true. Hence the elusive *"god-shot" that comes along now and again. Often pure fluke.

    -Robusto

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    Re: New Grinder... a few questions.

    I have the grind right, the tamp about right and what I am working on now is dosing. It is getting there.

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    Re: New Grinder... a few questions.

    Good onya Cindy,

    Have a great Christmas tomorrow,

    Cheers,
    Mal.

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    Re: New Grinder... a few questions.

    Success,
    I have got it right at last, also have the shakes from drinking too much coffee over the past few days too. ;D

    We bundled up the Classic and the Grinder and took them to OGs work as we were spending xmas day there and it was a bit hard to work on the dosing without the scales.

    I did get it right though this morning, so I am happy now. I was definitely underdosing and doing one tamp when the basket is half filled, then another after the basket is full was a good idea.

    On the whole I am very pleased with the MDF so far. It is not as noisy as I thought it would be, there is no clumping of the grounds and I have put three types of bean through it. No static either. Maybe becacuse it sits on a rubber mat to stop it sliding around on the bench.

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    Re: New Grinder... a few questions.

    Nice work Cindy - youre getting things sorted out quickly. :)

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    Re: New Grinder... a few questions.

    I am just stubborn and determined to get it. If it wasnt for all the reading I have done on here I probably wouldnt have gotten it sorted so fast. I still need to work on my tamping and dosing a little but it is getting there. They are just the things that take a little practice and will get better over time.



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