Early morning for many begins not with an alarm clock, but with the aroma of freshly ground grains, promising vivacity and clarity of thought. Coffee making in a carob machine is not just a technical process, but a ritual that requires attention to detail and an understanding of the physics of the process. Unlike capsule systems or French press, a carob (or pump) machine gives full control over the result, allowing you to turn a regular grain into a thick, saturated drink with a dense foam.
However, beginners often face disappointment: instead of a golden cream cap, a sour or bitter liquid without a body is obtained. The secret lies in the nuances.: from the quality of grinding to the strength of the pressing pill. Understanding these principles allows you to unlock the potential of even budgetary models, such as: De'Longhi Dedica or Breville BambinoAnd to get closer to the level of professional barista.
In this article, we will break down each stage of preparation so that you can consistently get the perfect espresso. We will cover the technical aspects of pump operation, the effect of water temperature on extraction and the typical errors that 90% of home car users make.
Choice and preparation of coffee beans
The quality of the drink depends on the raw materials, and no, even the most expensive equipment, will not correct the mistakes made at the stage of choosing a grain. For a carob coffee maker, it is critical to use fresh roasting, as old grains lose oils and gases necessary to form a dense roast. cream-foam. The ideal choice is a mixture dominated by Arabica with the addition of 10-20% robusta for body density, although modern monosort arabicas also show excellent results when properly adjusted.
Storage plays no less a role than the variety itself. Coffee is a hygroscopic product that instantly absorbs foreign smells and is oxidized by oxygen. Experts recommend buy grains in small packages with a degassing valve and store them in a dark, cool place, but not in the refrigerator where humidity is high.
⚠️ Warning: Never use oily-coated grains (dark Italian roasting) in machines with a built-in millstone grinder, as the oil clogs the millstone and causes the mechanism to break.
Before grinding, make sure the grains are at room temperature. A sharp temperature drop when cold grain enters the millstone can cause moisture condensation, which will lead to uneven grinding and the formation of lumps in the horn.
How do you check the freshness of a roast?
Fresh coffee when milled emits a characteristic crackle, and when brewed, it actively emits gases, forming a high foam cap. If the foam falls in seconds and has a pale color, the grains are stale.
Grinding adjustment: the key to the balance of taste
Grinding is the most important parameter that needs to be adjusted daily, as air humidity and room temperature affect the density of grain. A carob machine requires a thin, almost powdered grinding, but not in dust. If the particles are too large, the water will pass through the tablet too quickly, without having time to extract the flavoring substances, and you will get the undercooked Sour drink.
Too small grinding creates excessive resistance, water will drip barely or not go at all, which will lead to overextraction and bitterness. Ideally, the stream should resemble warm honey flowing in a smooth stream. The adjustment is made by the sample method: if the strait time of 30 ml is less than 20 seconds, reduce the fraction size, if more than 35 - increase.
- 🌰 Large grinding is suitable for robusta or light roasting, but requires high temperature.
- 🌰 Medium grinding is often used in machines with a pressurized tablet (pressurized basket).
- 🌰 Mining ("in flour") is necessary for a classic espresso made of fresh arabica.
The use of a high-quality grinder is more important than the cost of the coffee machine itself. Knife models ("mills") do not give the necessary uniformity of the fraction, which leads to channel formation, where water washes the path of least resistance, leaving part of the coffee dry.
The rule of the “golden mean”: the perfect grinding allows you to get 30 ml of espresso in 25-30 seconds at a pressure of 9 bar.
Dosage and tempering: creating resistance
After grinding, the coffee enters the holding (horn), where it must be properly distributed and compressed. This process is called tempering. The main goal is to create a uniform density over the entire area of the tablet so that water passes through it equally. If you press one side harder, the water will go through the looser part, spoiling the taste.
Dosage also matters: a crowded horn will not close the group until the end, and an underloaded one will leave too much free space, which will disrupt hydrodynamics. The standard dose for a double horn is 18-20 grams, but it is better to focus on the labeling of your filter basket or scales.
☑️ Checklist of the perfect tempering
The pressure strength of tempering is often overestimated. It is enough to press the weight of the body, leaning on the outstretched arm. The horizontality of the temper plane is more important: any distortion will lead to uneven extraction. Modern tools such as calibrated tamperThey help to avoid mistakes for beginners by cutting off unnecessary effort.
Extraction process: time and temperature
When the horn is set in the group, the most important stage begins - the strait. At this point, the pressure water passes through the coffee tablet, washing out the soluble substances. The water temperature in carob machines is usually 90-95°C, which is the optimal range for dissolving coffee oils without burning them.
The first seconds of the strait can be accompanied by a delay - this is normal, since the tablet must be soaked in water and begin to resist the flow. If the water went instantly and the fountain - grinding too large. If it drops one drop, it is too small. The ideal flow should be continuous, tapering towards the end of the strait.
| Parameter | Norma. | Deviation |
|---|---|---|
| Coffee dose | 18-20 | The taste becomes watery or too strong. |
| Strait time | 25-30 sec. | Sour (<25sec) or bitter (>35sec) taste |
| Drinking out | 30-40 ml | Violation of the balance of the fortress |
| Pressure. | 9 bar | Insufficient extraction or jet failure |
It is important not to over-consume coffee in the group after the pump stops. Residual pressure and high temperature can continue to wash out the bitterness from the already used pill, if you do not remove the horn immediately.
Common Mistakes and How to Fix Them
Even experienced baristas sometimes face an unstable outcome. Most often, problems are associated with ignoring the cleanliness of the equipment or a sharp change in the variety of coffee without adjusting the settings. Channel formation The most common reason for marriage is when through channels form in the trolley, through which water passes too quickly.
Another common mistake is using hot tap water for cooking. The water contains calcium salts, which quickly form a scale on the TEN and clog the narrow channels of the group. Always use filtered or bottled water with mineralization not higher than 70-100 mg / l.
⚠️ Warning: If the coffee stream is splashed or poured unevenly, stop the process immediately. This is a sign of the coffee pill breaking down inside the horn.
Don’t forget to warm up the cup before cooking. Cold ceramics instantly cool the thin stream of espresso, "breaking" its taste profile and killing the aroma. It is enough to rinse the cup with hot water from the nose of the steamer or group.
Caring for a stable result
Regular cleaning is the key to a long life of your coffee machine and a stable taste of coffee. After each preparation, it is necessary to throw away the waste pill and wipe the horn basket with a dry napkin, removing the remains of the small fraction. Dried coffee in the holes of the badge disrupts the flow of water at the next start.
Once a week, it is recommended to carry out a back wash (backlash) using a special cleaning agent, if the design of the machine allows it. This removes coffee oils that are oxidized and give an unpleasant rancid taste to the new drink.
- ☕ Daily wipe the steam tube with a wet cloth immediately after whipping the milk.
- ☕ Once a month, remove the group shower net and soak it in a solution of chemistry.
- ☕ Follow the indicator of the need for decalcination and carry out the procedure in a timely manner.
Timely replacement of sealing rings and filters is also included in the care program. Worn gums can pass water past the horn, reducing pressure in the system and worsening the quality of espresso.
Rub the group with hot water before installing the horn with coffee - this will wash away the remnants of old coffee dust and stabilize the temperature.
Frequently Asked Questions (FAQ)
Why is coffee sour, even though the beans are fresh?
Most likely, the problem is too large grinding or low water temperature. Try to reduce the size of the fraction on the grinder by one step or preheat the car in a single strait.
Can I use ground coffee from a pack in a carob machine?
Yes, but only if your car has a special adapter (a basket for one spoon) or a pressed tablet. Regular store-grown ground coffee often has the wrong fraction size for classic espresso, so the result can be watery.
How often should I decalcify?
The frequency depends on the hardness of the water and the intensity of use. On average, with daily preparation of 3-5 cups, the procedure is carried out every 2-3 months. The machine will report this by flashing the indicator.
Why isn't the steam coming from the cappuccinator?
Possibly clogged holes at the end of the tube with dried milk. Remove the tip (if it is removable) and soak it in hot water, then clean with a thin needle. Check the water level in the tank as well.