So I have noticed recently that my machine extracts at a much lower pressure on the second cup. I have never noticed this, it actually used to be the opposite.. Originally I put it down to the temperature of the system warming up thus the 2nd extract being higher.. But now its much lower.
So if the first one extracts at 10 bar and pretty much holds that for the whole extract, the second one can be as low as 6 bar and constant.
Volume of extract is high at 6 bar..
Grinder is the smart grinder. Sorry don't have model number at hand, but it's the one sold with the bes920 with digital display.
Any thoughts? My suspicion is the grind is changing? Seeing the flow is high with low pressure. But I really don't know so hope for some insights. I find it odd that it's always the second and on next cofffeee session it's back to high again for the first so this causes me to doubt its the grind changing.... Maybe I need to do more consecutive shots.
So if the first one extracts at 10 bar and pretty much holds that for the whole extract, the second one can be as low as 6 bar and constant.
Volume of extract is high at 6 bar..
Grinder is the smart grinder. Sorry don't have model number at hand, but it's the one sold with the bes920 with digital display.
Any thoughts? My suspicion is the grind is changing? Seeing the flow is high with low pressure. But I really don't know so hope for some insights. I find it odd that it's always the second and on next cofffeee session it's back to high again for the first so this causes me to doubt its the grind changing.... Maybe I need to do more consecutive shots.

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