11 Methods To Redesign Completely Your Machine Espresso
11 Methods To Redesign Completely Your Machine Espresso
Blog Article
How Does Machine Espresso Work?
Machine espresso employs precise pressure and incredible filter technology to produce the delicious coffee we enjoy. How exactly does it work?
To make espresso hot water is pushed under pressure through finely ground coffee. The process is similar to making drip coffee. However, the pressure is the main difference.
The Group Head
As the name implies, the group head is the place you place your portafilter while making espresso. It is responsible for dispersing water into the portafilter and then controlling the pressure that results from the extraction. There are many different types of group heads each with its own advantages and drawbacks. Some are focused on temperature stability, some on pre-infusion capabilities, and still others are designed to control the lever. Some have a combination, like the E61. This is a popular choice among baristas because it offers multiple advantages in one package.
As you can see in the above photo, the group head is fitted with a variety of notches. You can place your portafilter in these notches and then twist the head to lock it. There is also a gasket made of rubber in the notches and helps create an airtight seal after inserting your portafilter into the machine. The notches allow for precise placement of the portafilter. This is vital for an even extraction.
Apart from allowing you easily connect your portafilter, the group head is also responsible to ensure that the temperature remains even. It does this by circulating hot water through the brew pan and around the portafilter, making sure that it's always at the right temperature for extraction. It is important to realize that even a slight deviation can make the difference between a decent and a great espresso.
The Pump
The motorized pumps used in rotary espresso machines supply the nine atmospheric bar pressure required for espresso extraction. This is different from manual piston machines which use levers. The pressure is built by pumping water through a heat exchanger and then through the ground coffee.
Pumps tend to be more affordable and last longer than piston-driven machines. However, both types of machines are susceptible to degrading due to excessive use and poor cleaning. Pumps are also more complex mechanically, which can increase the cost of even simplest models.
Some espresso machines can eliminate the pump completely and instead make use of more info steam pressure to make espresso. The drawback is that the boiler that produces steam also raises the temperature of the water to boiling and can result in excessive extraction. Additionally these machines are often required to restore their pressure between cups, which requires time and energy.
Many espresso machines employ either a rotary or vibration pump, which has a vibration model that uses a vibrating disc to generate the pressure, and the rotary model pushing hot water through the grounds at high speed. Both models can produce an excellent espresso, but Rotary machines are quieter and more durable than vibration pumps.
The Boiler
The boiler is the one that heats the water to the perfect temperature to extract. The steam that is created reaches the portafilter, which contains the espresso coffee grounds. The steam is then channeled into the cup. The steam is able to create enough pressure to push the grounds of coffee through. This results in a layer of crema that is then poured over. This is one of the main characteristics of a good espresso.
There are three types of espresso makers, which differ in the type of pump they use and the degree of heat that the coffee is. There are a variety of ways to control the strength of the brew and the size of the cup that can be made by the machine.
The first espresso machines were steam-based. The earliest espresso machines were steam-type machines. The coffee tasted bitter and burned. The modern espresso machine was developed by the Milanese manufacturers Luigi Bezzerra & Desiderio Pavoni.
The most commonly used espresso maker is a semi-automatic machine that has an electric pump. When people think of espresso machines, they envision these machines. Semi-automatic machines require you to grind and tamp your beans yourself while the pump controls the water flow and pressure. This is an excellent compromise between human touch and the mechanised consistency.
The Filter
Typically, espresso machines employ a filter to separate out the coffee grounds as they pass through the hot water. The filter is also an essential element of the temperature control system, as it keeps the machine from overheating.
It also aids in flavor, as it allows for a more prolonged bloom phase. This allows the beans to release their nuances, and also allows for better extraction.
However, it is important to remember that even a high-quality filter can result in a poor cup of coffee, since the quality of the beans and extraction are vital.
It's in this area that the magic takes place. This is the reason why espresso tastes so good. The grouphead, also called the brew head, is where the portafilter (the thingy you put the ground coffee into) sits when you're making espresso.
In a steam-driven espresso machine, hot water is heated in an airtight container to create steam, which then pushes the hot water through the grounds at high pressure. They are less expensive and easier for the user to maintain than pumps-driven models. However, they are limited in their ability to provide the perfect conditions for brewing, since they are only operating at 1-1.5 bars of pressure. While the perfect shot requires 9-10 bars.
In recent years, compressed air pump-driven espresso machines have been gaining popularity. They use an air compressor to push hot water through the grounds, and are far more portable than steam-driven electric machines.