The grinding principle of the coffee grinder is to grind the coffee beans into fine powder so that it can be used to brew coffee. The grinding process mainly depends on the burrs inside the coffee grinder machine.
Conical burr grinding principle: Some home coffee machines use conical burr to grind coffee beans. There is a slit under the burr to guide the coffee beans to the position where the burr rotates. When the burr rotates rapidly, the coffee beans are sheared and impacted by strong force and gradually ground into powder.
Flat burr grinding principle: Commercial coffee machines or advanced home coffee machines usually use the flat burr grinding principle. These machine are equipped with two grinding burrs, a static grinding burr and a rotating burr. Coffee beans are dumped from the grinding bean bin into the space between the grinding burrs. When the rotating grinding burr rotates, the friction will grind the coffee beans into fine particles. The gap between the two grinding burrs can be adjusted to control the coarseness of the powder.
No matter conical burr or flat burr, you need to pay attention to the processing time and speed when grinding coffee beans. Too long or too fast may cause the coffee powder to overheat and destroy its flavor and aroma. Therefore, when grinding coffee beans, you need to adjust it according to the desired coffee type and personal preference to obtain the best extraction effect.
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