Automatic Calibration Process For Coffee Grinder-Doser Apparatuses With Weighing Device And Electronic Grinder-Doser Apparatus

Abstract

Automatic calibration process (10) for electronic grinder-doser apparatuses (20) of coffee in beans provided with an electronic weighing device (210-2) directly connected to the logic control unit (203) of the apparatus, wherein the grinding times necessary for obtaining the requested dose weight in grams of ground coffee are pre-set, said process being aimed at periodically checking the quantity of coffee actually ground, re-calculating and re-setting the grinding times in said logic unit. Said process (10) particularly comprises a first phase (Phase A) of start, a second phase (Phase B) of sampling by multiple short and long detections, a third phase (Phase C) of processing by compensation calculation and a fourth phase (Phase D) of self-adjustment, said second, third and fourth phases (Phases B-D) being totally automatic, that is to say, being sequentially carried out by the electronic grinder-doser apparatus (20) as automatic procedures by the logic control unit (203).

Description

technical field [0001] The invention relates to a method for automatic calibration of electronic grinding and dosimeter devices for coffee beans provided with electronic weighing equipment for the periodic control of the actual amount of ground coffee and subsequent resetting of the dose weight in grams to the required number The associated milling time; the invention also relates to an electronic milling and dosimeter device for carrying out said method. [0002] The invention has particular application in the industrial sector of professional bar equipment for making espresso; moreover, the invention applies to any electronic device for grinding organic products requiring periodic adjustment of the grinding time. Background technique [0003] In general, a professional machine for making espresso coffee, generally called a coffee machine, is widely known and is generally characterized in that its body consists of a boiler that generates hot water as well as steam, sending ...

AI Technical Summary

Problems solved by technology

[0026] Most of the above-mentioned solutions aim at overcoming the known difficulties experienced by operators on a daily basis in obtaining ground coffee with accurate mass of ground and dosimeter; The conventional approach to correction is slow, uncomfortable, and imprecise, since many approximations are necessary before the desired result is obtained

It has been observed in practice that common external dimensions involve several manual operations and also have a high risk of error, that is, independent of the grinding and dosimeter since they are not connected to the logic control unit; especially in most modified solutions , such as the solution of D1, provides the addition of a complex electronic calibration circuit that interacts with a logic unit that acts as an interface with the user, who has to carry out the weighing and manually enter the data, in such a way that the circuit can function On the logic unit of the grinding and dosimeter

[0027] In schemes where the product is weighed during dispensing, such as in D2, D3 and D4, problems have been identified which are inherently related to the tolerances of the weighing equipment, making such schemes very difficult to be effective

In particular, we have observed that in order to dynamically measure precise changes in the weight of a few grams, roughly between 7 and 7.5 grams, in the case of single doses of ground coffee, highly sensitive weighing devices with extreme precision, such as telescopic The electronic load sensor of the meter, so it is not suitable for violent changes, the internal motor of the grinding and dosimeter transmits this violent change to the whole body of the device, thus making the weighing value not very reliable, and it may not be possible to correct the system

[0028] In addition, it has been observed that abrasive dosage control schemes with heavy containers, that is to say, with a considerable tare weight relative to the contents, also have an asymmetrical protruding shape that must be handled with care, and are therefore not suitable for detecting hundreds of Grams for branch one, for example in D5, where the handle basket is weighed separately on a separate device of small size also provided with an electronic interface; for professional use, this solution is expensive, fragile in use, Uncomfortable and imprecise results

Images