Recap and Glossary
- We create margins of error for shot times and beverage weights. Some recipes are stricter than others, allowing a smaller margin of error.
- Shot time and grind setting are interlinked.
- Micro-adjustments and tiny changes to the grind bring about only a 1-second or 2-second change in shot times.
- Macro-adjustments are the large changes needed if you go outside your shot time target range.
- When you make macro-adjustments you need to purge your grinder; when you make micro-adjustments you don’t.
- Most grinders don’t give you all the beans you put into them straight away. This phenomenon is called grind retention.
- Some designs have as much as 60 g of retention; some have as little as 0.5 gram.
Beverage weight A measurement of the size of a coffee beverage that includes all the consumable coffee liquid, i.e., it does not include any brew water that doesn’t make it into the cup or service vessel
Blend Single-origin coffees combined together
Burrs The cutting/crushing disks used in most espresso and filter grinders; usually, one burr is stationary and one spins.
Hands-free dosing A system of dosing coffee wherein the portafilter latches into a housing on the grinder so that the barista doesn’t need to hold the portafilter as the grinds fall into the basket
Micro-adjustment A minor grind adjustment that corrects a shot time from the edge of the margin of error back to the middle;