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output by weight not volume - start at 2:1 then tweak from there?
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20g of coffee in the portafilter for 40g of liquid out in 25-30 seconds is the ballpark to aim for. I usually weigh about 18g of grounds when dialling in a new bean but eyeball it after that. 60ml is a lot, I'd start with a finer grind.
James hoffman has a couple of videos on it, part 2 came out a couple days ago:
https://www.youtube.com/watch?v=lFwJF-_SUr0
https://www.youtube.com/watch?v=1eK0eidOA_U
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fills the portafiliter to the right level.
Also, weigh your shots. If you have your portafilter filled to a certain point, then make the grind finer and put more coffee in, you can fill it to the same point. Those two variables both give you a longer extraction time. So going by how much you fill the portafilter is not a great way to measure how much ground coffee you're putting in.
Similarly, grind time varies with the fineness. If your machine grinds for a given amount of time, and you make the grind finer, the flow of coffee through the machine will be slower. So if you aim on having the weight of coffee the same, but making it finer, you should increase the time to keep that consistent.
How much coffee you put in will also depend on the size of your portafilter, the usual 18-20g is generally geared towards ~58mm baskets which are the norm these days. My machine has a 51mm basket so I end up around 15.5g instead. Just another thing to consider.
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kkg337
Colonel_of_Truth
mmccarthy
@Mr_Sworld
Dialing in a grinder for espresso. Talk to me.
60ml (2oz) in 25 to 30 seconds? A 20 sec grind time fills the portafiliter to the right level.
The coffee seems bitter when I set a grind size to do that in the right time.