Understanding
How a component works, explained without shortcuts.
Deep dive
ECBC, SCA and brewing temperature
«92-96 °C» is not a margin of uncertainty: it is the standard that two different bodies verify independently, and it is…
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The 15 bar myth
Fifteen bar is the pressure the pump can reach, not the pressure the coffee comes out at. They are two different number…
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Pre-infusion and pressure profiling
Before pushing to nine bar, wet the puck. And then, instead of holding one pressure from start to finish, decide how it…
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Vibration or rotary pump
Two ways of pushing water to nine bar: one is cheap, fits anywhere and makes noise; the other is quiet, lasts longer an…
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Flat or conical burrs
Two geometries that grind the same bean in two different ways. The question is not which is better, but what shape the …
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Mechanical thermostat or PID
A thermostat switches off and on around a threshold. A PID anticipates. Between the two lie the degrees that separate a…