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Mazzer Robur uneven grinds?

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  • #31
    No worries! Glad to know I'm not the only insane one for single dosing Robur-E at home

    Another question : do you use a bottomless portafilter? I discover that the grind needs to be mixed to pull evenly under a naked portafilter. So because of that, I grind into a stainless steel dosing cup, give it a quick shake/stir, and then pour into the basket. I don't dose directly into the portafilter from the grinder. Slightly more hassle but the results are spot on every time and worth the extra effort for me.

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    • #32
      Originally posted by skidquinn View Post
      One thing I've just realised as I type this, is that after single dosing, I always remove the electronic doser chute lid and with a small brush, brush out any grounds I can reach and then purge the grinder?
      Ahhhh that makes more sense

      I don't single dose, but when I do completely flush the system (after grinding a bag of plunger for a friend for eg) it does take 4-5 secs for a good flow of grounds to start coming out again, then 3-4 secs more to fill. So sounds like your machine may be fine - it's just not really being used as it was intended

      The whole question of retained grinds is another one of 'those' questions around here - you'll bring out all sorts! FWIW I've left the screen in mine and don't flush out after each grind. This is fine, with little impact on the taste IMHO if you are doing 2-3 doubles/triples a day so refreshing regularly - less than this and it starts to be an issue. But it is a commercial grinder designed for high turnover…
      Just my 2 bobs

      Cheers Matt

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      • #33
        From time to time I do use a bottomless portafilter, however most I make are split for me and the wife. So doesn't get as much use as I'd like.
        However, when I've used it I haven't found issues with uneven shots grinding straight into the portafilter.
        I'll give that a go now that I've got new burrs and report back.

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        • #34
          Originally posted by DesigningByCoffee View Post
          Ahhhh that makes more sense

          I don't single dose, but when I do completely flush the system (after grinding a bag of plunger for a friend for eg) it does take 4-5 secs for a good flow of grounds to start coming out again, then 3-4 secs more to fill. So sounds like your machine may be fine - it's just not really being used as it was intended

          The whole question of retained grinds is another one of 'those' questions around here - you'll bring out all sorts! FWIW I've left the screen in mine and don't flush out after each grind. This is fine, with little impact on the taste IMHO if you are doing 2-3 doubles/triples a day so refreshing regularly - less than this and it starts to be an issue. But it is a commercial grinder designed for high turnover…
          Just my 2 bobs

          Cheers Matt
          Good to hear. Thanks Matt.
          Interesting point re. retained grinds. I might also give this a go and see if I can actually taste a difference.
          One of the other big reasons I single dose is I like changing around beans.
          Certainly agree with you on the commercial grinder point.... but I was offered this one at a price that I simply couldn't refuse. Plus they are awesome. haha

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          • #35
            Originally posted by DesigningByCoffee View Post
            Ahhhh that makes more sense

            I don't single dose, but when I do completely flush the system (after grinding a bag of plunger for a friend for eg) it does take 4-5 secs for a good flow of grounds to start coming out again, then 3-4 secs more to fill. So sounds like your machine may be fine - it's just not really being used as it was intended

            The whole question of retained grinds is another one of 'those' questions around here - you'll bring out all sorts! FWIW I've left the screen in mine and don't flush out after each grind. This is fine, with little impact on the taste IMHO if you are doing 2-3 doubles/triples a day so refreshing regularly - less than this and it starts to be an issue. But it is a commercial grinder designed for high turnover…
            Just my 2 bobs

            Cheers Matt
            I agree Matt - that is exactly what I've found with my Kony-e. I just load the hopper with the day's worth of beans in the morning (100g +/-) and grind away. I might dump the first double worth, but no purging between shots and my screen is intact.

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            • #36
              Originally posted by pcf1978 View Post
              I agree Matt - that is exactly what I've found with my Kony-e. I just load the hopper with the day's worth of beans in the morning (100g +/-) and grind away. I might dump the first double worth, but no purging between shots and my screen is intact.
              Yep. I only have 120-150g in my micro-hopper - might purge 5-10g before a grind. There might be a slight difference overnight after a late morning brew the day before, but with my super freshly roasted beans (I often end up with them in the machine the same day when people turn up wanting some right now!) I tend to find it can help to settle to pour - really fresh through can be a little bright, but a few hours helps to rest them in the chute!

              I must be a bad, bad, bad snob

              And I tried removing the screen once - a coffee flew out of the bottom of the spout all over the bench and virtually none in the p/f - so out went that idea! Is there for a reason I guess!

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