Method for making and dispensing coffee-based beverages

A method for making and dispensing coffee-based beverages in machines having a preheating boiler with temperature control, a hydraulic pump, a dispensing assembly, and means for controlling both the thermal power delivered within said preheating boiler and the thermal power delivered by said dispensing assembly, and means adapted to weigh the ground coffee in a filter basket holder and the weight of the dispensed product in a cup, the method including the following steps:

• increasing the temperature inside said heating boiler and inside said dispensing assembly, in order to achieve a preheating thereof with reading of the associated temperature in order to adjust the delivered thermal power,
• a first dispensing step of preheated water at a selected temperature in order to achieve a pre-infusion in a preset time or for a preset volume of water in the absence of pressure in said hydraulic pump, wherein the coffee powder is only wet,
• a second dispensing step in order to achieve an infusion of the coffee powder into which, by means of the use of a logic unit that manages the volume of dispensed water by means of a volumetric meter and at a preset and constant pressure as a function of the weight of the ground coffee and of the dispensed product, an amount by volume of water is dispensed which is calculated to achieve a selected and preset brew ratio wherein the brew ratio is the ratio of infusion water to ground coffee, and
• a third dispensing step to achieve a post-infusion wherein the pressure is reduced for a time needed to reach by weight a programmed dose of dispensed product.