Types of Espresso Machines
Espresso machines generally fall into three categories:
Super-automatic espresso machines
Semi-automatic espresso machines
Manual or lever espresso machines
A super-automatic machine does everything automatically -- the grinding, the tamping, the brewing, and sometimes even the disposal of the used grains are all done with the press of a button. They leave maintenance and consistency out of the hands of the operator in order to create ease and quality with every espresso shot. However, many prefer to have some control in the tamping and brewing process. It is considered an art form to produce the perfect espresso.
Semi- and fully-automatic espresso machines will control the pressure required to brew electrically, but the grinding, the pulling of the shot, and the tamping must all be done manually. The espresso is then brewed with the push of a button. The machine will usually need to be taken apart and cleaned manually. It is easy to use, and generally the most affordable type, but will allow variance in quality as the tamping and grinding will be inconsistent.
The manual or lever espresso machine is operated solely by hand, except for the heating unit. The water is forced through the shot by pumping a piston manually. This can be an aesthetically pleasing machine made of chrome or copper finish, and the challenge and art that goes into preparing a superb espresso using a manual machine is oftentimes a source of great pride in baristas. The highest quality of espresso can come from a manual machine, yet the wide opportunities for variations in the process will lead to inconsistencies.