Automatic Tablet Coater working principles: Inside the coating machine rolling drum, the bare tablets are made to move along a consecutive and complicated track. In the process of the motion, controlled by the programming system, coating medium is automatically sprayed (or trickled) to a tablet surface according to the selected technological sequence and parameters by a peristaltic pump and spraying gun (or a drip pipe with sugar pump for sugar coating). At the same time, finely-filtrated clean hot air from the hot air cabinet penetrates the tablet bed and then is exhausted from the bottom of the drum and discharged after being dedusted so that a solid and smooth film or sugar coating can be quickly formed on the tablets.