Espresso machine

An espresso machine

is used to produce the traditionally Italian coffee beverage called espresso.
Generally, espresso is produced by forcing 90°C (200°F) water through 7-10 grams of finely ground coffee, which has been compressed with approximately 30 lbf (130 N) of force into a densely packed puck, at a pressure of 900 kPa (9 bars) or greater.

Types of espresso machines
A manual piston espresso machine
Since their invention in 1901, multiple machine designs have been created to produce espresso. They generally share some common elements. The portafilter (or group handle) contains a metal filter-basket and holds the ground coffee. It is locked under the group head's diffusion block.

An ideal double shot of espresso should take 20-25 seconds to arrive, timed from when the machine's pump is first turned on. Varying the fineness of the grind, the amount of pressure used to tamp the grinds, or the pump pressure itself can be used to bring the extraction time into this ideal zone. Most prefer to pull espresso shots directly right into a pre-heated demitasse cup or shot glass, to maintain the ideal temperature of the espresso.

An espresso machine may also have a steam wand which is used to steam and froth milk for beverages such as the cappuccino and latte

Steam-driven
A steam-driven unit operates by forcing water through the coffee by using steam or steam pressure. The first espresso machines were steam types, produced when a common boiler was piped to four group heads so that multiple types of coffee could be made at the same time. The design is still used today in low-cost consumer machines, as it does not need to contain moving parts.

Piston-driven

The piston, or lever, driven machine was developed in 1945 by Achille Gaggia in Italy. The design generically uses lever, pumped by the operator, to pressurize hot water and send it through the coffee grinds. The act of producing a shot of espresso is colloquially termed pulling a shot, because these lever-style espresso machines required pulling a long handle to produce a shot.
There are two types of lever machines; manual piston and spring piston design. With the manual piston, the operator directly pushes the water through the grounds. In the spring piston design, the operator works to tension a spring, which then delivers the pressure for the espresso (usually 8 to 10 bar).
The piston-driven machine is the origin of the crema, which was originally thought to be an undesirable waste product but is now considered characteristic of a properly made shot of espresso.

Pump-driven

A refinement of the piston machine is the pump-driven machine, which has become the most popular design in commercial espresso bars. Instead of using manual force, a motor-driven pump provides the force necessary for espresso brewing. Commercial or some high-end home machines are often attached directly to the plumbing of the site; lower-end home machines have built-in water reservoirs.
Home (consumer-grade) pump espresso machines typically use a single chamber both for heating water to brewing temperature, and to boil water for steaming milk. Since the optimum temperature for brewing coffee is much less than the temperature for creating steam, the machine requires time to make the transition from one mode to the other. Commercial-grade and "semi-commercial" high end home espresso machines use the boiler chamber only for making steam. Water for brewing most commonly passes through a heat exchanger (taking some heat from the steam, without rising to the same temperature). In a few commercial espresso machines (notably La Marzocco), water for brewing is heated in a separate chamber.

Steaming in With Espresso Machine Tips

So what exactly is espresso coffee? An espresso coffee is sold at the café in a small cup and is an extremely strong cup of coffee. Espresso is used in making café latte, cappuccino and café mocha. Espresso is made in the espresso machine by forcing about two ounces of hot water through tightly packed finely ground espresso coffee. The resulting liquid is a deep brown color with a slight froth on top. Espresso makers differ in the water temperatures, the fineness of the espresso coffee, the pressure with which the water is pressed through the coffee and how tightly the coffee grinds are packed in the machine.

There are many different types of espresso machines available in the market place today in different sizes, styles and abilities. Just like any other appliance it is important to do your homework before venturing out on your shopping excursion. Start by asking yourself how often will you use your espresso machine, what will you be using your machine for, how much are your willing to spend and are you willing to trade quality for price.

If you rarely partake in the espresso ritual and prefer an occasional cappuccino or latte, then don’t spend too much money on your machine. If you are a coffee enthusiast and have acquired a preference for espresso taste then a high end espresso machine is worth the investment. An espresso coffee machine doubles as both a coffee maker and espresso maker. If you have limited counter space and like the best of both worlds this machine gives you that option. Diligently compare espresso machines and find one with features that suit your particular need.

Do your homework before heading out. Make sure to read espresso machine reviews. These unbiased consumer reviews give valuable consumer insights. There are many places to purchase your home style espresso machine; kitchen supply stores, department store home sections, catalogues and online vendors. Make sure you purchase a machine that matches your level of expertise. Making espressos is considered an art with a professional espresso maker being referred to as a Barista. Being an espresso barista in some countries is considered a serious occupation requiring occupational training. Baristas learn and practice making a consistently high quality shot of espresso. They learn how to grind the perfect espresso coffee, how to pack the coffee right and how to operate the commercial espresso maker. Being a home espresso maker however does not require that you take Barista training. Home style espresso machines are simplified versions of the more complex café style espresso maker.

Once you have purchased your espresso machine remember to purchase the accessories that make the espresso/cappuccino experience more enjoyable. There are special espresso cups and spoons and espresso machine cleaning brushes and detergents that can be purchased from different vendors online. It is important to care for your espresso machine as recommended by the manufacturer for the machine to last longer producing delicious tasting espresso each time.

Automatic Espresso Machines - Fully or Semi Automatic?

When it comes to automatic espresso machines
there are two main options you have to choose from. The first option is a semi-automatic or super-automatic espresso machine and the second is a fully-automatic espresso machine. An automatic espresso machine has typically been used in a commercial setting, but more and more are showing up in household kitchens.

Semi-automatic espresso machines

require some level of participation from the user. This user must start the initial process of the espresso machine, until the automatic portion takes over. Once the brewing process has been completed, the user must than turn off the machine. Semi-automatic espresso machines are significantly cheaper than fully automatic.

Fully-automatic espresso machines

do not require any user participation whatsoever. The machine can automatically handle each step in the espresso making process. These machines are usually larger and more expensive than their semi-automatic counterparts. This type of automatic espresso machine is quite complex, as it has its own sequenced coordinating system of water, grinder, and extractor.

The first step is to determine which of the two types of automatic espresso machines

would best fulfill your needs. If you are planning on using the machine commercially, the fully-automatic espresso machine would be the most logical choice. With no need for user participation and the ability to produce more espresso at a faster rate, these machines are perfect for commercial use.

If the espresso machines will only be used in a home environment

a semi-automatic espresso machine might make more sense. Since they are more compact and less expensive, semi automatic espresso machines work very well in the kitchen. A semi automatic espresso machine can be purchased online for as little as $150 dollars.

Once you have decided which type of automatic espresso machine

you would like to purchase, do some research on the Internet to find the specific machine that suits you best. At this point, you can use your own criteria such as price or specific features you are looking for to find the perfect automatic espresso machine.

Espresso Coffee Machine

An espresso machine is used to yield the traditional Italian coffee brew called 'espresso.' A professional operator of an espresso machine is called a 'barista.' 'Espresso' is a savory coffee beverage prepared by forcing hot water under high pressure through finely ground coffee. The familiarity necessary to make premium espresso is regarded as a skill similar to artisan baking.

The process of making espresso creates a creamy, almost syrupy, brew by removing and blending the oils in the ground coffee. A perfect double shot of espresso should take about 20-25 seconds to prepare, timed from when the machine's pump is first turned on to when the drink falls in the cup. Changing the fineness of the grind, the amount of pressure used to compress the grinds, or the pump pressure itself can be used to bring the withdrawal time into this model zone. Many prefer to draw espresso shots directly into a pre-heated shot glass to preserve the ideal warmth of the espresso.

There are different types of espresso machines like the stovetop espresso maker, the steam espresso maker, the piston-driven espresso maker, the traditional pump-driven espresso machine, semi automatic espresso machine, automatic espresso machine and super automatic espresso machine. These different types of espresso machines are different only because of the processes and mechanisms they use to prepare the coffee. Of these, the oldest and most traditional machine is the stovetop espresso machine and the steam espresso machine that were invented in Italy, where the concept of espresso itself was born. These methods are rarely used to prepare espresso, except for in certain places in Italy. The most commonly and widely used espresso machines are the automatic and super automatic machines used by all the famous coffee houses like Starbucks.