sbenyo wrote:I tried again, this time with beans roasted two days ago. I use Guatemala beans which are very good.
Same thing. No matter how I do it, the coffee comes either too slow or too fast. It's always unsteady stream, shaky, and not strong uniform flow.
It's also either over extracted or under with bad flavors.
I also tested two different grinders (K3, Ceado) which I think eliminates the grinder being the issue.
I don't believe it should be like this. Even if I am not accurate in parameters after so many tries I should at least get once a decent shot. I believe something is with the machine itself is wrong.
2 days is a bit too fresh, give them a few days to rest and things will likely improve some.
Some beans have a very small window where they are ideal for espresso, others have a very large window.
Also, are these light roasted? Sometimes light roasts just have ugly pours no matter what you do (go by taste at this point). You could also try a nice med/med dark espresso blend, they tend to be easier to pull.