Is it still taking 12 seconds to grind 20grams of coffee?
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Mazzer Robur uneven grinds?
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Timing has improved as well, but is not where it should be yet. At a guess I'd say closer to 8-10 seconds for 20 grams. However, I have only been single dosing the grinder, which causes it to grind slower than with a hopper & beans above it. Might test this tonight.Originally posted by rackxp View PostIs it still taking 12 seconds to grind 20grams of coffee?
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Yep and my grind is only as find as it needs to be to produce good shots from the Silvia.Originally posted by rackxp View PostDid you buy genuine burrs? Are you grinding to fine? That's still too long in my experience. Should be around 4 seconds with new burrs.
I'll check the grind speed tonight when the hopper on it and report back
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I agree - with new burrs there is still something that doesn't sound quite right. I have mine set at around 3.8secs for a 25g triple basket…Originally posted by rackxp View PostDid you buy genuine burrs? Are you grinding to fine? That's still too long in my experience. Should be around 4 seconds with new burrs.
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Didn't get a chance to test last night, so only had a chance for a quick test this morning before work. Will do some more checking tonight.
But so far found..... Time to grind 20grams single dosed was 9 seconds. Made my second coffee of the morning shortly after with the hopper on but only about 150 grams of beans in the hopper (I'm also new to the home roasting and haven't quite worked out my timing of when to roast yet!!). The grind time with beans in the hopper was just under 7 seconds for the same volume. So slightly quicker. I think this would probably be even quicker with more grinds in the hopper??
First photo is a shot of the grinds and second photo shows ~ 30ml espresso which poured in 26 seconds. The beans are only 4 or 5 days old so I think I'm using them sooner than I should.
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. I do this because there seems to be a fair amount of grounds that are in there. I haven't actually tested whether I can taste a difference between doing this or simply leaving the grounds for the next coffee? Any advice on this? I also assume this then plays with the timing of the next shot as there aren't the grounds at the front of the grind path that there would be if I didn't sweep them out?
Hope this makes sense.....
Anyway, let me know thoughts or if I'm doing anything particularly wrong.
Thanks
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Looks fine to me. My dose is 15g for 30-40s extraction.
Just measured my timing this morning - my grind time is about 9-11s before I hear the sound starts changing - indication of 95% grind was done. There is normally a bean or two worth of chunks not going through due to popcorning. So at that point, I stop pressing the button and then pulse again (I don't use the single/double button). 100% of the beans will go through then - rather than holding the button for 15-20s continuously in one go.
To be honest, it's not worth loading the hopper with 1 kg worth of bean just to get it down to sub 4s grind time - too much wastage. I'm pretty sure if you load more beans, it will get close to 5s, and less when the burrs are broken in further. The Robur is so much quieter compared to ANY grinder I've owned in the past, so it's not really a problem.
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Thanks mate. I too only use the manual grind button. Also gives me a chance to lightly tap the portafilter to settle 80% of grounds before grinding the rest in. I found using the preset timer I'd end up with grinds all over the bench.Originally posted by samuellaw178 View PostLooks fine to me. My dose is 15g for 30-40s extraction.
Just measured my timing this morning - my grind time is about 9-11s before I hear the sound starts changing - indication of 95% grind was done. There is normally a bean or two worth of chunks not going through due to popcorning. So at that point, I stop pressing the button and then pulse again (I don't use the single/double button). 100% of the beans will go through then - rather than holding the button for 15-20s continuously in one go.
To be honest, it's not worth loading the hopper with 1 kg worth of bean just to get it down to sub 4s grind time - too much wastage. I'm pretty sure if you load more beans, it will get close to 5s, and less when the burrs are broken in further. The Robur is so much quieter compared to ANY grinder I've owned in the past, so it's not really a problem.
Agreed. I was not planning on leaves beans in the hopper ongoing, rather wanted to ensure my grind speed and quality is on par with other Roburs.
Thanks for your input.
GQ
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