The Inkjet Coding Machine is suitable for marking surfaces of materials like paper boxes, labels, tags, and certificates with embossed or colored prints of production dates, product batches, expiration dates, and quality inspection results. It features automatic sheet separation, counting, arbitrary positioning, pre-set print counts, clear embossing, color options, fast printing speed, instant dry, and low waste. The coding machine applies pressure to the ink within the system by controlling an internal gear pump or by supplying compressed air externally, causing the ink to be ejected through a nozzle with a few micrometers in diameter. A crystal oscillator signal above the nozzle splits the continuous ink line into drops of the same frequency, size, and spacing. The drops are then charged individually as they pass through a charging electrode, with the amount of charge controlled by the central processing unit (CPU). Afterward, the drops are detected for correct charge and phase by a detection electrode; the charged drops are deflected in a deflecting electric field formed by the deflection electrodes and ejected from the nozzle to print at various positions on the product surface, creating the desired text and pattern markings. Uncharged drops are collected in a recovery tray and re-enter the ink circulation system within the machine.