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I have a Espresso machine (Rocket R58).

I'm curious why my pour starts to drip halfway the pull. Is there any explanation why halfway and not from the get-go?

I do understand I need to go more coarse to fix this...

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  • Welcome! While coffee is in principle on topic here, we've found that Coffee often has more specific advice on questions like this, so I'm migrating it there.
    – Cascabel
    Sep 29, 2016 at 15:55
  • @Jefromi, awesome! Didn't know we have a coffee exchange! Thanks!
    – Roger
    Oct 1, 2016 at 5:48

2 Answers 2

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It's the pre-infusion feature of your machine in conjunction with the grind you were using. From their site:

Pre-Infusion: To extract the full flavor and aroma when you brew your espresso, the R58 has a dual pre-infusion system encompassing a working piston and static pre-infusion chamber.

Most machines that have this feature understand that the pre-infusion is done based on the amount of water that has flowed, not how much time has passed (which is a good thing). So, if the puck is too dense, it can take quite a bit of time.

Adjusting grind a bit should fix it.

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There may be some advice on this. My first will be to check the pressure as you can do this with your pretty machine. Please check if you are around 9 bars when pulling the shot.

One reason of delay is, it takes a while for the water to wet the grounds. So, it is normal to wait for a few seconds to see the first drops. However; if it is more than a few seconds, the most possible problems I can think of are:

  • The pressure is not enough
  • You have tamped so forcefully
  • The grind is too fine
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    Thanks! It starts to flow between 3-5 seconds, and looks allright. But ½ way the shot (12-17 seconds), it suddenly starts to drip. The puck is also a bit mud-isch, maybe indeed its all about the grind (to fine).
    – Roger
    Oct 2, 2016 at 9:22
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    Please check this discussion for adjusting grind size. However, muddy puck may indicate insufficient amount of coffee. Please check if you use 7 to 8 grams of coffee per espresso shot (30 ml).
    – MTSan
    Oct 2, 2016 at 16:31

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