How do you grind up them beans?
Blade Grinder: Blade grinders are nothing more than little blenders that slice, tear, and smash the coffee beans.
Burr Grinder: They're slow (about a minute for one cup), but they produce a very consistent collection of particles, and there is no chance of burning the coffee.
Disc & Conical: These grinders have serrations or grooves cut into the discs or cones. The coffee beans fall in between the two discs or cones, one of which turns while the other remains stationary. The sharp edges of the grooves are what cut the beans and result in the most precise, and consistent grind.