Electronic grinder-doser apparatus (10) of the type with weight control or "grind-by-weight", intended to grind and precisely dose coffee in beans dispensing the ground product in a filter-holding bowl (200) for espresso coffee; the invention implements a dose compensated weighing system, of the multi-cycle and feedback type at every cycle, carried out by a device (116) with a load cell (103) and specific execution programs (117). Said cell is interposed between the machine body (105) and a base (102) shaped in such a way as to integrate the centering fork (113) of the bowl, making the hooking independent; said specific programs (117) execute each grinding and dispensing cycle with a double weighing and automatic calibration, according to an Algorithm A comprising 4 steps (AF1-AF4) and a Filtering Algorithm B. The apparatus (10) is suitable for professional daily use and helps the operator, by automatically calibrating during use.
