by JmanEspresso on Sat Feb 06, 2010 1:30 pm
To add to what Chris said... If you keep a load of beans in the grinder(not adding per shot), then when you make a grind change, before you pull the shot, it would be good practice to purge/grind some coffee through, because there will coffee at your previous grind setting not only in the chute, but in the burrs and burr chamber, and possibly in the doser. The suggestion often seen on retailers websites to only make grind changes when the grinder is grinding,(to avoid mashing the burrs into the bean between them when going finer), effectively purges the grinder as well.
Some grinders do have a notch, or marking of some sort, on the grinders body, that you can use as a reference point for your grind. Owners of grinders with no such marking usually make their own, in some way or another.