The value of the roughness and fineness of coffee machine grinding-- introduction to the flavor description of coffee bean grinding

The value of the roughness and fineness of coffee machine grinding-- introduction to the flavor description of coffee bean grinding

Before debugging, you need to taste the four cups of espresso made by the preheating machine to infer the performance of the bean grinder when it is used frequently. Once again, I need to remind you not to use the automatic weight function of the electronic bean grinder. But if you have special needs, you can also use it, but in the process of debugging the coffee mill, the automatic powder quantity and weight of the bean mill will also change, which means that you need to constantly debug it in order to ensure the constant quality. 1) use the manual pulverizing button and measure the powder weight with an electronic scale. There will be an error of + /-0.2g when using manual pulverization. This is the conclusion we reached during the test, so you need to add or remove a little coffee powder to achieve the most standard weight. Some of our customers use small cups instead of handles when weighing them. You can also do this. After measuring, you can pour the coffee powder directly into the handle.

2) press powder according to your usual habit. In order not to destroy the just set amount of coffee powder, you need to use uniform strength when pressing the powder, so that the surface level of pressed powder, the overall pressure of pressed powder is moderate. No matter what method you use, you need to pay attention to the consistent method of pressing powder each time, so as to avoid the effect of making skills on the quality of coffee.

3) before using an electronic scale to measure the total weight of coffee, you need to put the coffee cup on the scale and then clear it. You also need a stopwatch to measure the extraction time. It would be great if you had a stopwatch on your coffee machine. You can also find a special timer to measure the extraction time.

4) start extracting coffee. If there is no scale on your coffee cup, you need to measure the total weight of the coffee (28-32g). Measuring weight can help you determine whether coffee extraction is fast or slow, which is much more accurate than visually measuring the flow rate of coffee. This is not to say that visual observation is useless, but at least the numbers don't lie to you.

5) if you use a coffee cup with a scale, that would be great. But you still need to measure the total weight of the coffee to better determine whether the grinder needs to be readjusted. If you use an automatic divider, the total weight of the coffee you make will have an error of about 3G. Since the scale on the cup can help you determine the liquid volume of coffee, you need to spend more energy on measuring the extraction time of coffee.

Let me tell you the importance of these data. Whenever we adjust the coarseness of the bean grinder to + /-1 scale, the extraction time of coffee will change by 4-5 seconds, and the total weight of coffee will have an error of 10g.

The blade grinder is another common bean grinder, which works on the principle that a fast rotating blade will cut the coffee beans into fine particles. This kind of bean grinder is usually cheap, but the coffee powder it grinds is of average quality because the blade generates a lot of heat when rotating and cutting. In addition, the size of the coffee powder cut by the blade grinder is uneven, which will greatly affect the final quality of coffee. Usually, the blade grinds the beans to produce a small amount of ultra-fine coffee powder like sawdust, which can cause the coffee to have a negative taste of excessive extraction and bitter taste. These very fine coffee powders can also clog the outlet of the Italian espresso machine or the filter of French-pressed coffee, so it is not recommended to use a blade grinder when making these two kinds of coffee. However, the blade type bean grinder also has certain advantages, compared with the gear type bean grinder, its grinding speed is faster and the noise is lower. Keep in mind that small changes in the particle size of coffee powder will directly affect the final quality of coffee, so we recommend that you use a tapered gear grinder. Bean grinders can be roughly divided into two types: gear type bean grinder and blade type bean mill. The working principle of the gear grinder is that two gear-shaped or conical grindstones rotate quickly to crush the coffee beans between them, generating very little heat in the process. This process of extrusion and crushing can well release the aromatic essence and oils in the coffee, making the coffee taste more mellow and silky. Generally speaking, the grinding degree of the gear type bean grinder is very wide, which is suitable for all kinds of brewing methods, such as Italian espresso, French pressure coffee, drip filter coffee and so on.