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Thread: Mazzer Mini E slow grind

  1. #1
    Senior Member gonzob's Avatar
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    Mazzer Mini E slow grind

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi all.

    I've recently purchased a Mazzer Mini E type A from another CSer. It's good. I pulled it apart (referrring to the mazzer doc on the forum), cleaned it and adjusted it. I have a problem with the grind speed. On the double-shot setting I've run out of adjustment on the timer, and still the pf is not sufficiently full. When I top it up manually, it pulls a good slow shot, so the grind is about right.

    I've done a few searches on the forum and it seems to me that the MM grinds slowly, but maybe this is too slow.

    What do I check?

    Gonzo

    PS OOPS - could a moderator move this to the grinders section please...?
    Last edited by gonzob; 7th March 2016 at 07:58 PM.

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    If I'm reading correctly you have gone into the menu and increased the grind time to the max? Sounds like a new set of burrs may be in order then..

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    Senior Member gonzob's Avatar
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    Sorry, a bit more detail: it's the older type A with the timer adjusting screws. Also, the CS who sold it said it had done about 20kg total... hard to tell, I guess.

    Gonzo

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    Senior Member gonzob's Avatar
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    And yet more detail:
    The burrs look fine - sharp edges, no chips.
    The maximum time on the timer is 18sec, and this produces 14g of grinds.
    Currently using Ethiopian Gambella Sundried.

    Sounds normal? or not?

    Gonzo

  5. #5
    Life-long Learner DesigningByCoffee's Avatar
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    Grind too fine after strip down? Or if you grind manually on that setting it's all good?
    (although the Mini-E's are quite slow anyway from what I've readů)

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    Senior Member magnafunk's Avatar
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    Although I've never used a mini, it often gets slammed for it's slow grind times. I had a super jolly that took 12 seconds for 18g with new burrs, so you're most likely in the ballpark of average grinding times for the mini.

  7. #7
    Senior Member noonar's Avatar
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    Hi Gonzo, I have the same MM and yes it is slow. Especially slow if like me you are weighed dosing and then clearing the exit chute without the benefit of a loaded hopper to increase the load behind the beans at the burr. To get the full 19gms of grind I put in, I push the double shot button and then the single shot button, which is timed to end just as the last bean passes thru the burrs. I then clean out behind the anti static screen with a brush and bamboo skewer, also into the portafilter. As said, it takes 2 grind attempts (one double, one single) for the whole weighed 19gms to pass thru the burrs without the weight benefit of a loaded hopper.

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    Senior Member gonzob's Avatar
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    @noonar - hadn't thought about the beans behind "pushing" the ones in front. I run a max of about 100g in the hopper, so that may be a factor. I like the idea of a double followed by a single. It sounds like the grinder might be performing normally. BTW, I have removed the static screen, and use a photo slide blower bulb to flush out the chute.

    @DBC - I think the grind is not too fine - Silvia takes about 30 to 40 secs for a double shot.

    Gonzo

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    The thing about this grinder that's got me is how far you have to turn the adjustment to get a fine grind. The super jolly I was using was set to 5 and I have to have my mini set to 8!

  10. #10
    Senior Member gonzob's Avatar
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    jcjuice - I think the numbers on the ring are meaningless. Have a look at the grinder documentation forum (under Grinders). There's a doc there about adjusting and cleaning the Mazzer. You first have to clean it out, then set a "zero" point by winding down the ring until the top burr touches the ejection arms on the bottom burr. Mark that point on the ring (I used liquidpaper) where the front cut-out is (just under the ring), then move it coarser by ~13 notches to get an espresso grind. Worked first time for me. I grind about 1 notch coarser than that. Mark that "operating" spot with a texta so you can get back there quickly after pulling it apart.

    Gonzo

  11. #11
    Senior Member gonzob's Avatar
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    It's all about technique...

    I have accepted that the Mazzer is slow, and it's enabled me to take a new approach to dosing. I've adjusted the double-shot timer to about 12 secs, and now when I want a coffee I do this:

    Dose one 12-secs-worth into the pf
    Tamp lightly
    Dose another 12-secs-worth
    Tamp again.

    and I don't need the pf "funnel" any more, as I'm tamping mid-dose.

    Gonzo

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    Doesn't the Mini E fit S.J burrs? If you want to increase the speed, swap out the burrs with some from the Super Jolly.

    Looks to increase the speed a lot.

    https://www.youtube.com/watch?v=mpBdMunhNjQ

  13. #13
    TC
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    Quote Originally Posted by jmadden91 View Post
    Doesn't the Mini E fit S.J burrs? If you want to increase the speed, swap out the burrs with some from the Super Jolly.

    Looks to increase the speed a lot.
    We tried it and ours stalled about 30% of the time. Recipe for a dead grinder as the motor doesn't have the power to safely drive SJ burrs.

    If you want a Super Jolly, buy a Super Jolly.

    The mini-e is so outclassed by all competitors, it's a wonder Mazzer sells any at all. Underspecced and overpriced.
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    Quote Originally Posted by Talk_Coffee View Post
    We tried it and ours stalled about 30% of the time. Recipe for a dead grinder as the motor doesn't have the power to safely drive SJ burrs.

    If you want a Super Jolly, buy a Super Jolly.

    The mini-e is so outclassed by all competitors, it's a wonder Mazzer sells any at all. Underspecced and overpriced.
    Fair enough. I've never tried it, just saw the video.

  15. #15
    Senior Member gonzob's Avatar
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    Quote Originally Posted by Talk_Coffee View Post
    The mini-e is so outclassed by all competitors, it's a wonder Mazzer sells any at all. Underspecced and overpriced.
    OK, it's slow, but it seems to grind well. I'm not getting the shot-to-shot variation in flow that I got with my previous Baratza Preciso, and there's no clumping. Since I bought it secondhand, I guess I missed the "overpriced" bit.

    Gonzo
    TC and nathanharley like this.

  16. #16
    rbk
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    I asked the Visiting Italian Mazzer rep at MICE about putting in Super Jolly blades to speed up my Mini E. He strongly discouraged it, saying it would clog or seize the blades. From the sounds of this thread, he was right.

  17. #17
    htb
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    I had a Mini E and installed SJ burrs. It did stall occasionally. If another one I would install SJ burrs again. That said, if you are in the market, A M4D would get around the problem.

  18. #18
    Senior Member gonzob's Avatar
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    Thanks for your advice CS-ers.

    My original query, after just buying the Mini secondhand, was "is the slow grind normal". My take on all the thoughts above is that it IS slow. I will persevere with the standard burrs, will just have to wait for my coffee. Fortunately it's worth the wait!!

    Gonzo

  19. #19
    Senior Member Yelta's Avatar
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    I agree the Mazzer is a bit slower than other grinders, not necessarily a bad thing, speed means heat generation and heat is detrimental to ground coffee, particularly if you plan on storing it for a while.

    The Mazzer is certainly not the in grinder right now, however it's still a very capable machine and does a pretty good job.

    Yep, I own a Mazzer Mini and see no convincing argument to change.



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