AI & Automation
How to dial in espresso using grind, dose and time
A useful dial-in routine changes one variable at a time and records the result. This guide shows a simple sequence that a person or an assistant could follow, with one worked example from sour to balanced.
01
Fix dose and set a target
Begin by locking the variables you will not touch. Choose a dose, such as eighteen grams in the basket, and a target yield, for example thirty-six grams out, which is a common one-to-two starting ratio. Aim for a shot time near twenty-five to thirty seconds as a reference, not a rule. Write these numbers down before pulling anything. Fixing the dose matters because a moving dose hides the effect of every other change. An assistant would store this baseline and treat it as the reference every later attempt is compared against.
02
Adjust grind and read the clock
Pull the first shot and record the time and taste. Worked example: eighteen grams in, thirty-six out, finished in nineteen seconds and tasted sharp and thin. That pattern usually suggests the water ran through too quickly, so grind one step finer and repeat with the same dose. The second shot ran twenty-four seconds and tasted rounder but slightly bitter at the end. Change only the grind between attempts. Each result goes into the log with time, yield and a one-line note, because patterns appear only when the entries are comparable.
03
Taste, decide and stop when it works
Use taste to choose the last move. If the twenty-four second shot is a little harsh, try stopping the yield at thirty-four grams or loosening the grind half a step, but never both at once. When the cup is sweet, clear and pleasant, save the recipe with dose, grind setting, time and yield, plus the bean and roast date. Beans age, so expect to revisit the grind in a week. A good tool would remind you of the saved baseline and suggest only one adjustment, leaving the final decision to the person tasting.