The grindability of espresso explains in detail: how fine is the coffee powder of espresso?

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.

Since we use a large bean grinder, the above changes may not be so obvious on a small bean grinder. But this is enough to prove how important the data is in debugging the bean grinder.

[start debugging bean grinder]

When you do this, most brands of bean grinders on the market will store 60g ground coffee powder. According to our experience, you need to store at least 100g of coffee powder in the bean grinder before you can start debugging the machine, and the debugging effect is more obvious. So, you need to make at least three more espresso before you start debugging the bean grinder, and when you're done, you have to make at least five or more cups of coffee. This is very important! The last thing you want to do is go back to work and retest and debug your machine.

At this point you need to decide whether to re-clean the coffee mill. In order to ensure the quality of coffee, if your debugging range is more than 2 scales, you need to thoroughly clean your bean grinder. Although we don't want to waste coffee, according to our experience, the effect is better after cleaning the bean grinder.

[analysis results]

If you get the results you want, congratulations! But remember, this is just the beginning. Ensuring the accuracy of the data in the test does not guarantee the perfect quality of your coffee, but it is still a shortcut for you to pursue the best quality of your coffee! If you successfully use this method to calculate the formula for one type of coffee, you can start testing the data needed to make other varieties of coffee, such as drip coffee. Then you will know which data is useful and which is not.

Once you have the exact data, when you taste the coffee again, you will know how to adjust the coffee mill according to the taste. You can adjust the time of coffee extraction by controlling the thickness of the powder. A two-second gap will have a huge impact on the taste of coffee. So you can try to fine-tune the coffee mill to find the coffee that best suits your taste.

At the same time, don't be afraid to start from scratch. We have tried hundreds of times before coming to the above conclusion. So keep your motivation and dare to try, you can get the perfect result.

[record your results on a machine]

Under normal circumstances, in the peak period of use, the electronic bean grinder will have a little error, the error is about + /-0.5g. This usually happens to people who are used to testing the amount of powder by volume rather than weight.

Now all you need to do is enter the data into the bean grinder and let it record your exclusive recipe. But you still need to keep testing the accuracy of the bean grinder. If the machine is accurate enough, you don't need to make any more adjustments. But if the machine is not accurate enough, you need to set the machine data in detail and reduce the error to within + /-0.5g. The smaller the bean grinder, the more energy you need to adjust the machine, because the deviation is sometimes very large.

[ensure the consistency of the formula]

If you run a coffee shop, you will find that the value you set will change throughout the day. This is because the temperature of the coffee mill itself is not constant. When you debug the coffee mill, you need to be aware that the amount of flour is consistent and there can be no deviation, because changes in other data will affect the amount of powder produced by the coffee mill.

Some people can enjoy the success after debugging the coffee mill, while others have to constantly adjust the bean grinder before making each cup of coffee. As long as you follow the above steps, you can get coffee with constant quality and first-class taste!