Guides
Understanding
How a component works, explained without shortcuts.
Deep dive
Understanding
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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Understanding
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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Understanding
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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Understanding
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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Understanding
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…